28 June 2020, Volume 38 Issue 12
    

Think Tank
Exclusive: Advanced Combined Cycle Powered Vehicle
Review
Papers
Science and Technology Humanities

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    Think Tank
  • Strategic choice and main features of Sino-German intelligent connected vehicles
    LI Fangsheng, ZHAO Shijia
    Science & Technology Review. 2020, 38(12): 6-14. https://doi.org/10.3981/j.issn.1000-7857.2020.12.001
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    A new round of science and technology revolution is poised to start, which will trigger profound changes in the global automotive industry. Intelligent connected vehicles(ICVs) have become an important breakthrough in the transformation and upgrading of the automotive industry, and have attracted much attention. This paper reviews the background conditions and strategic choices of the development of China Germany ICVs, analyzes the main characteristics of the development of China Germany ICVs, and proposes that China and Germany should continue to deepen cooperation in industry management, key technologies, standards and regulations, test demonstration and other aspects to jointly promote the development of ICVs.
    • Exclusive: Advanced Combined Cycle Powered Vehicle
  • Future application of combined cycle propulsion technology
    ZHANG Xuhui
    Science & Technology Review. 2020, 38(12): 15-24. https://doi.org/10.3981/j.issn.1000-7857.2020.12.002
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    Combined cycle propulsion combines two or more single types of power organically, with integrate each other in structure and complements each other in function, greatly expanding flight envelope and improving flight efficiency. It has important applications in near space hypersonic vehicle, reusable space transportation system and other fields. This paper introduces the basic classification and working principle of combined cycle propulsion, reviews the application of combined cycle propulsion technology in near space hypersonic vehicle and reusable space transportation system, and summarizes the development trend and main key technologies of combined cycle propulsion vehicle.
  • Application analysis of combined cycle engine in horizontal take-off and landing aerospace vehicles
    GONG Chunlin, CHEN Bing
    Science & Technology Review. 2020, 38(12): 25-32. https://doi.org/10.3981/j.issn.1000-7857.2020.12.003
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    The horizontal take-off and horizontal landing (HTHL) aerospace vehicle is an important means for future space rapid response and low-cost space transportation. Combined cycle power has full envelope flight capability, and uses air as an oxidant in the atmosphere to greatly enhance the specific impulse of the engine. Therefore, it is the preferred engine system for future HTHL aerospace vehicle. This paper reviews the development history and status of the combined cycle powered aerospace vehicles at home and abroad, and describes the advantages and disadvantages of various types of takeoff and landing. The advantages of HTHL and the requirements for the vehicle and engine are clarified. By comparison of RBCC and rocket for aerospace vehicle, the application advantage of combined cycle engine in HTHL aerospace vehicle is confirmed.
  • Research progress of oversea combined cycle propulsion technology
    ZHANG Shengsheng, ZHEGN Xiong, Lü Ya, QIAO Xiaohui, ZHANG Yong
    Science & Technology Review. 2020, 38(12): 33-53. https://doi.org/10.3981/j.issn.1000-7857.2020.12.004
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    Combined cycle propulsion technology is an organic combination of multiple propulsion technologies from the aspects of thermal cycle, structural configuration and so on, which has the characteristics of wide flight envelope and better comprehensive performance. In this paper we summarize the development history of foreign combined cycle engines, then introduce several mainstream typical combined cycle engines. We also discuss and summarize the development trend and key technologies of combined cycle propulsion technology. Finally we propose some suggestions for technology development.
  • Progress and analysis of rocket based combined cycle(RBCC) propulsion system
    ZHANG Mei, ZHANG Mengzheng, LIU Hao
    Science & Technology Review. 2020, 38(12): 54-68. https://doi.org/10.3981/j.issn.1000-7857.2020.12.005
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    Reuse is a promising technology for launch vehicles. Rocket based combined cycle(RBCC) propulsion system is a good choice for reusable launch vehicles. In this article the development status of RBCC engine and key technological issues are described, possible application areas, and development path are analyzed as well. To make full use of the advantages of ramjet and rocket engine and remedy function disfigurement and performance deficiency of LRE(改为全称) or ramjet distinguishes RBCC engine from other power engines. On the basis of current technologies, the RBCC engine solution formed by different working modals and engine configurations is the developmental route of RBCC power system to meet the needs of fly mission.
  • Progress and prospect of key technologies for turbine based combined cycle engine
    CHEN Min, JIA Xinhao
    Science & Technology Review. 2020, 38(12): 69-84. https://doi.org/10.3981/j.issn.1000-7857.2020.12.006
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    Turbine based combined cycle engine will be the main power device of future hypersonic aircraft. It can meet the requirements of space transportation, high-speed transportation and long-distance rapid strike. It has the advantages of conventional take-off and landing, repeated uses and good economy. This paper reviews the development of key technologies of turbine-based combined cycle power in many aviation powers, and analyzes the key technical bottlenecks that must be solved in the research of turbine based combined cycle engine technology including mode transition, aircraft and engine integration, ultrawide operating range, high temperature resistance, compatibility and so on. Combined with the advanced experience of foreign countries, the paper expounds the development prospects and suggestions of domestic turbine based combined cycle engine research, and summarizes the key technical problems of turbine based combined cycle engines that must be solved.
  • Research progress of pre-cooled air-breathing combined engines and analysis of the key technology
    MA Xiaoqiu
    Science & Technology Review. 2020, 38(12): 85-95. https://doi.org/10.3981/j.issn.1000-7857.2020.12.007
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    Based on an analysis of the characteristics of pre-cooled air-breathing combined engine, the research progress of five types of engines in the world are summarized. Key techniques, advantages and disadvantages of the engines are also analyzed and discussed. Finally a proposal for future development of the engine is presented.
  • An overview of hypersonic aero-propulsion integration test facilities
    WU Yingchuan, HE Yuanyuan, ZHANG Xiaoqing, MAO Xiongbing
    Science & Technology Review. 2020, 38(12): 96-102. https://doi.org/10.3981/j.issn.1000-7857.2020.12.008
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    The history of hypersonic propulsion facilities and tasks are briefly reviewed in this paper, the operating principle, main structures and basic parameters of these reclassified facilities are also surveyed, including direct-connect supersonic combustion test facility, combustion-heated high temperature tunnel, arc-heated scramjet test facility, high enthalpy shockwave facility and combustion-heated impulse tunnel. After an analysis of the characteristics of different facilities, it is pointed out that the combustion-heated impulse tunnel is the ideal facility for aero-propulsion integration test.
  • Research progress of thermal management technologies for hypersonic flight vehicles
    GOU Jianjun, HU Jiaxin, CHANG Yue, CHEN Bing, GONG Chunlin
    Science & Technology Review. 2020, 38(12): 103-108. https://doi.org/10.3981/j.issn.1000-7857.2020.12.009
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    In this paper, thermal management technologies for hypersonic flight vehicles are reviewed from the point view of heat dissipation and reuse. For heat dissipation, concepts concerning such as passive/semi-active/active thermal protection, structure/thermal integrated protection, and other multi-functions are reviewed. For heat reuse, some regenerative cooling and thermoelectric conversion technologies are also reviewed. Finally, based on the characteristics and research progress of aforementioned technologies, some potential research fields of thermal management for hypersonic flight vehicles are proposed.
  • Reflection and analysis on management mode of combined-cycle aerospace vehicle technology R&D based on the military and civilian integration
    CAI Wenyi, JIANG Jialing, QIU Yufeng, GAO Xiaoming
    Science & Technology Review. 2020, 38(12): 109-114. https://doi.org/10.3981/j.issn.1000-7857.2020.12.010
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    To meet the needs of new space vehicles in the future, the combined power engine emerges timely. This paper introduces the main types and working principles of the combined power system, makes a preliminary analysis of the research progress and management mode of the typical combined power vehicle technology project in the United States, and puts forward some relevant measures and suggestions based on the military and civilian integration strategy in China.
    • Review
  • Progress in characterization of nanoscale mechanical properties of organic matter in shale
    WANG Xiaolei, SI Shujie, A Dou
    Science & Technology Review. 2020, 38(12): 115-128. https://doi.org/10.3981/j.issn.1000-7857.2020.12.011
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    At present the mechanical behavior of shale organic matter at nanometer scale is neither clear nor able to be accurately obtained by conventional experimental instruments. It is of great practical significance to characterize the mechanical properties at nanometer scale for building a micro-macro rock mechanics model and realizing high efficiency hydraulic fracturing. Based on the recent advances in characterization of nanoscale mechanical properties of organic matter in shale at home and abroad, commonly used characterization techniques, main characteristics and main controlling factors of mechanical properties are reviewed and summarized in this paper. It is shown that nano-indentation and atomic force microscope are the commonly used techniques and methods to characterize nano mechanical properties at present, both of which have their own advantages or defects in precision, resolution, equipment technology and so on. At present, determination of nanomechanical properties of organic matter mainly focuses on elastic modulus and hardness. Maturity and temperature change the internal structure of organic matter to varying degrees, thus changing its mechanical properties. In the end, the paper puts forward some ideas and suggestions for the exploration and development of shale gas in China.
  • Status and prospect of research on architectural heritage protection: A quantitative study using IJAH 2014-2018
    WANG Sisi, CHANG Chen, SUN Zhe, GONG Yongwei
    Science & Technology Review. 2020, 38(12): 129-140. https://doi.org/10.3981/j.issn.1000-7857.2020.12.012
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    To provide a thorough understanding of the international research status on architectural heritage protection and make a comparison between China and foreign countries, 342 articles published by International Journal of Architectural Heritage (IJAH), the one and the only journal concerning architectural heritage in the database of Web of Science, from 2014 to 2018 are analyzed using statistical and bibliometrics methods. From the analysis, it is shown that the research has focused on structural behavior, surveying and mapping, and material analysis, and that the international study is characterized by interactive multithematic structure among mechanical behaviors, material characterization, surveying and mapping, environmental science and others, and has selection bias of research objects, as well as employs multi-analysis research method etc. Besides, there is still a capacious development space for domestic research in quantitative analysis, interdisciplinary study, expansion of research contents.
    • Papers
  • On the development law and influencing factors of urban rail transit construction mileage in China
    LI Diyuan, ZHAO Zening, LUO Yuxuan
    Science & Technology Review. 2020, 38(12): 141-148. https://doi.org/10.3981/j.issn.1000-7857.2020.12.013
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    Urban rail transit construction is significant to urban development and is an important part of urban construction. This paper uses single- and double-factor analysis to study the impact of urban GDP and central area population density on the development mileage of urban rail transit. Based on this, the development of urban rail transit is divided into three stages, and a qualitative and quantitative analysis of policy impact is also conducted. The results show that the initial requirement for urban GDP of rail transit construction is about 500 billion yuan and the initial requirement for population density of central area is about 4,000 people/km2. Different stages of rail transit development are affected by urban GDP and central area population density in different degrees. The higher the rail transit investment ratio, the higher the policy impact coefficient is. The development of rail transit in most cities of China is promoted by policies, such as Wuhan, but there are also a few cities, such as Shenyang, where rail transit is inhibited by policies.
  • On the relationship among various influence factors of unsafe civil aviation flight behavior based on social network analysis
    WANG Wenke, ZHANG Yan, ZHAO Yuanyi, LIU Xinyue
    Science & Technology Review. 2020, 38(12): 149-158. https://doi.org/10.3981/j.issn.1000-7857.2020.12.014
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    To enhance the management of civil aviation flight safety, a set of factors influencing unsafe behavior is determined through literature analysis and stakeholder survey． Then a network model of relationship among these factors is built by applying social network analysis. Its node attributes, core-edge analysis, structural feature, influence and hierarchical clustering are investigated．The result shows that the key unsafe behavior influencing factor nodes can form a reaction chain, which can in turn connect with others into a high-risk behavior network. Among them, the key unsafe behavior influence factors include job burnout, safety supervision, and business skills proficiency. There is a chain of behavioral reactions, including "the level of knowledge is low- procedures are not strict- civil aviation flight is unsafe", etc. Some kinds of behavior such as job burnout, stress, etc. can serve as bridge nodes in the network of factors influencing unsafe behavior．
  • Intervention of descriptive social norm information on environmental decision making and its application
    ZHENG Yu
    Science & Technology Review. 2020, 38(12): 159-168. https://doi.org/10.3981/j.issn.1000-7857.2020.12.015
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    Descriptive social norms are the rules that most people actually act on. The study of descriptive social norm information is important for intervention of environmental decision making. In this paper we analyse intervention of descriptive social norm information on environmental decision making and discuss its limitation in terms of research validity, environmental behavior category, and culture difference. Using decision making behavior, we explore the descriptive social norm information influence on Chinese environmental decision making and intervention mechanism through two experiments. In experiment 1, Chinese participants are exposed to two groups of descriptive and injunctive norms about environmental decision making under light scenario and recycle bag scenario. Result reveals that participants are more likely to cooperate when presented with descriptive social norm information. Experiment 2 replicates this effect on high-cost environmental behavior, and shows that the intervention mechanism is based on the perspective of information attribution. Information reliability plays a mediator role in the relationship between descriptive norm information and environmental behavior. For future research, we discuss bidirectional associations between descriptive and injunctive norms based on Chinese environmental background and boundary conditions. The paper is expected to provide a converging evidence to shed light on the environmental decision making research in intervention science, as well as provide theoretical and methodological support for formulating regulations, policies and propaganda relating to environmental decision making.
  • Study on the characteristics and influencing factors of evening leisure activities in the elderly
    CUI Hongjun, ZHANG Xiaoyang, ZHU Mingqing, LI Xia, BAI Haili
    Science & Technology Review. 2020, 38(12): 169-175. https://doi.org/10.3981/j.issn.1000-7857.2020.12.016
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    This paper investigates the evening leisure activities in the elderly., The elderly leisure activities mainly include sitin, walk and square dance. Male elderly people choose to walk and sit more than women, and the proportion of females who participate in square dance is up to 87%. The travel distance of the elderly leisure activities in the evening is generally short; most elderly people walk in the range of 0.5-1.5km the travel distance of the elderly decreases significantly with the increase of age, and this decline trend is more obvious in the female than in the male. The travel distances of the elderly who choose different types of leisure activities are significantly different since travel distances of different activities are different. Through a network survey which collects data to characterize the elderly leisure activities in the country, it is found that the overall travel rules of the elderly are similar, and the peak ranges of the travel distance are slightly different due to the urban economic level and the degree of construction completion. Thanks to the establishment of the Logit model to study the influencing factors of the elderly leisure activities, it is shown that gender and family structure have significant impact on the choice of the type of leisure activities in the elderly. The research results have certain guiding significance for community layout and urban planning in aging society.
    • Science and Technology Humanities
  • Alan Bond and SABRE
    FAN Siyi, ZHENG Sihang, QIN Yunpeng, HU Pengju, FEI Wanghua
    Science & Technology Review. 2020, 38(12): 176-180. https://doi.org/10.3981/j.issn.1000-7857.2020.12.017
    Abstract ( ) Download PDF ( ) HTML   Knowledge map   Save
    The SABRE engine combines the characteristics of turbo engine, rocket engine, and ramjet engine, and is an innovative, co-aspirated rocket engine. This article reviews the development process of the SABRE, introduces its compositions and the new technologies adopted, analyzes the two working modes of the aspirated and rocket, and explans their corresponding working principles. In the end its application prospect is presented.

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