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| 1 | Experimental demonstration of a new concept of drag reduction and thermal protection for hypersonic vehicles显示文摘A new idea of drag reduction and thermalprotection for hypersonic vehicles is proposed based on thecombination of a physical spike and lateral jets for shock-reconstruction. The spike recasts the bow shock in front ofa blunt body into a conical shock, and the lateral jets workto protect the spike tip from overheating and to push theconical shock away from the blunt body when a pitchingangle exists during flight. Experiments are conducted in ahypersonic wind tunnel at a nominal Mach number of 6. Itis demonstrated that the shock/shock interaction on the bluntbody is avoided due to injection and the peak pressure atthe reattachment point is reduced by 70% under a 4°attackangle. | Zonglin Jiang Yunfeng Liu Guilai Han Wei Zhao Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China | 2009 | Acta Mechanica Sinica2009，25，3： | 14 |
| 2 | Criteria for hypersonic airbreathing propulsion and its experimental verification显示文摘Hypersonic airbreathing propulsion is one of the top techniques for future aerospace flight, but there are still no practical engines after seventy years’ development. Two critical issues are identified to be the barriers for the ramjet-based engine that has been taken as the most potential concept of the hypersonic propulsion for decades. One issue is the upstream-traveling shock wave that develops from spontaneous waves resulting from continuous heat releases in combustors and can induce unsteady combustion that may lead to engine surging during scramjet engine operation.The other is the scramjet combustion mode that cannot satisfy thrust needs of hypersonic vehicles since its thermos-efficiency decreases as the flight Mach number increases. The two criteria are proposed for the ramjet-based hypersonic propulsion to identify combustion modes and avoid thermal choking. A standing oblique detonation ramjet(Sodramjet) engine concept is proposed based on the criteria by replacing diffusive combustion with an oblique detonation that is a unique pressure-gain phenomenon in nature. The Sodramjet engine model is developed with several flow control techniques, and tested successfully with the hypersonic flight-duplicated shock tunnel.The experimental data show that the Sodramjet engine model works steadily, and an oblique detonation can be made stationary in the engine combustor and is controllable. This research demonstrates the Sodramjet engine is a promising concept and can be operated stably with high thermal efficiency at hypersonic flow conditions. | Zonglin JIANG Zijian ZHANG Yunfeng LIU Chun WANG Changtong LUO | 2021 | Chinese Journal of Aeronautics2021，34，3： | 9 |
| 3 | On theory and methods for advanced detonation-driven hypervelocity shock tunnels显示文摘This study describes theory and methods for developing detonation-driven shock tunnels in hypervelocity test facilities.The primary concept and equations for high-enthalpy shock tunnels are presented first to demonstrate the unique advantage of shock tubes for aerodynamic ground-based testing.Then,the difficulties in simulating flight conditions in hypervelocity shock tunnels are identified,and discussed in detail to address critical issues underlying these difficulties.Theory and methods for developing detonation drivers are proposed,and relevant progress that has advanced the state of the art in large-scale hypersonic test facilities is presented with experimental verifications.Finally,tailored conditions for detonation-driven shock tunnels are described,laying a solid foundation to achieve long test duration.This interface-matching key issue encountered in developing shock tunnels has been investigated for decades,but not solved for detonation drivers in engineering applications. | Zonglin Jiang Jinping Li Zongmin Hu Yunfeng Liu Hongru Yu | 2020 | National Science Review2020，7，7： | 6 |
| 4 | Aerodynamic force and moment measurement of 10°half-angle cone in JF12 shock tunnel显示文摘An aerodynamic force and moment measurement was conducted in JF12 long-testduration detonation-driven shock tunnel of Institute of Mechanics,Chinese Academy of Sciences.The test duration of JF12 is 100–130 ms.The nominal Mach number is 7.0 and the exit diameter of the contoured nozzle is 2.5 m.The total enthalpy is 2.5 MJ/kg which duplicates the hypersonic flight conditions of Mach number 7.0 at 35 km altitude.The test model is the standard aerodynamic force model of 10° half-angle sharp cone.The length of the test model is 1500 mm and the weight is 57 kg.The aerodynamic forces were measured with a six-component strain balance.The angles of attack were set to be à5°,0°,5°,10° and 14°,respectively.The experimental results show that in the 100–130 ms test duration,the signals of strain balance have 3–4 complete vibration cycles.So,the aerodynamic forces and moments can be obtained directly by averaging the signals of balance without acceleration compensation.The force measurement error of repeatability of JF12 is less than 2%.The aerodynamic force coefficients of JF12 are in good agreement with those of conventional hypersonic wind tunnels.For this test model at Mach number 7.0 and total enthalpy of 2.5 MJ/kg,the real-gas effects on aerodynamic force characteristics are not very evident. | Yunfeng LIU Yunpeng WANG Chaokai YUAN Changtong LUO Zonglin JIANG | 2017 | Chinese Journal of Aeronautics2017，30，3： | 5 |
| 5 | Fucoxanthin Isolated from Undaria pinnatifida Can Interact with Escherichia coli and lactobacilli in the Intestine and Inhibit the Growth of Pathogenic Bacteria显示文摘Fucoxanthin is a xanthophyll-type carotenoid that provides many benefits to human health. However, the mechanism by which fucoxanthin interacts with microbes and inhibits pathogenic bacteria is unknown. In this study, we investigated the effects of fucoxanthin isolated from the edible seaweed Undaria pinnatifida on pathogenic bacteria Escherichia coli and lactobacilli both in vitro and in vivo. Fucoxanthin strongly inhibited the growth of Gram-positive pathogenic bacteria but was less effective against Gram-negative bacteria. Fucoxanthin extracted from the crude mixture had a recovery rate of 93.38% and a purity of 82.70%, which were higher than those of fucoxanthin extracted using a previous method. Fucoxanthin also promoted the growth of intestinal mi- crobes in mice. Fucoxanthinol, a metabolite of fucoxanthin, was generated in the culture media. Fucoxanthin can be deacetylated into fucoxanthinol not only by conventional digestive enzymes in the digestive tract, but also by E. coli and lactobacilli in the intestine. These results indicate that fucoxanthin interacts with and influences E. coli and lactobacilli in the intestine. Therefore, fucoxanthin isolated from Undaria pinnatifida possibly can be applied in human health maintenance. | LIU Zonglin SUN Xiaowen SUN Xun WANG Shuhui XU Ying | 2019 | Journal of Ocean University of China2019，18，4： | 5 |
| 6 | Reconsideration on the role of the specific heat ratio in Arrhenius law applications显示文摘Arrhenius 法律含有那仅仅拥有比活化能 E 能反应。然而,如果特定的热比率 γ
和煤气的经常的 R 在化学反应过程期间变化,内部精力不与煤气的温度成正比。变化 γ
可以显著地影响在经常的 γ
假设下面与 Arrhenius 法律计算的化学反应率,它广泛地在爆炸和燃烧模拟被接受许多年了。在这篇论文,在 Arrhenius 法律应用的可变 γ
和 R 的角色被重新考虑,并且他们化学反应率上的效果被模仿一个维的 C-J 和二维的细胞的爆炸表明。有可变 γ
和 R 的一个新全面一步舞爆炸模型被建议改进 Arrhenius 法律。数字实验证明这条改进 Arrhenius 法律在与在对试验性的数据的好同意的数字结果预言爆炸现象工作很好。 | Yunfeng Liu Zonglin Jiang | 2008 | Acta Mechanica Sinica2008，24，3： | 3 |
| 7 | An electrochemical biosensor based on DNA tetrahedron/graphene composite film for highly sensitive detection of NADH显示文摘 | Li Zonglin Su Wenqiong Liu Shuopeng | 2015 | Biosensors and Bioelectronics2015，69，7： | 1 |
| 8 | Preparation, morphology, and mechanical properties of elastomers based on α,ω-dihydroxy polydimethylsiloxane/polystyrene blends 显示文摘 | Dong Jian Liu Zonglin Han Nianfeng | 2004 | J Appl Polym Sci2004，92，6： | 1 |
| 9 | Elastomers based on α,ω--dihydroxy-polydimethylsiloxane/polystyrene blends: Morphology and mechanical properties显示文摘 | Dong Jian Liu Zonglin Cao Xiaoqun | 2006 | J Appl Polym Sci2006，101，4： | 1 |
| 10 | Preparation of Soap--flee Cationic Emulsion Using Polymerizable Surfactanff 显示文摘 | Jin Liqiang Liu Zonglin Xu Qinghu Li Yanchun | 2006 | Joumal of Applied Polymer Science2006，99，03： | 1 |
| 11 | Preparation, morphology, and mechanical properties of elastomers based on α,ω-dihydroxy polydimethylsiloxane/polystyrcne blends显示文摘 | Dong Jian Liu Zonglin Han Nianfeng | 2004 | J Appl Polym Sci2004，92，6： | 1 |
| 12 | Elastomers based on α, ω-dihydroxy-polydimethylsiloxane/poly-styrene blends: Morphology and mechanical properties显示文摘 | Dong Jian Liu Zonglin Cao Xiaoqun | 2006 | J Appl Polym Sci2006，101，4： | 1 |
| 13 | Preparation, morphology, and mechanical properties of elastomers based on α, ω- dihydroxy polydimethylsiloxane/poly(methyl methacrylate) blends 显示文摘 | Dong Jian Liu Zonglin Feng Yongbin | 2006 | J Appl Polym Sci2006，100，2： | 1 |
| 14 | Preparation,mor-phology,and mechanical properties of elastomers based onα,ω-dihydroxy polydimethylsiloxane/polystyrene blends显示文摘 | Dong Jian Liu Zonglin Han Nianfeng | 2004 | J ApplPoly Sci2004，92，6： | 1 |
| 15 | Preparation,mor-phology,and mechanical properties of elastomers based onα,ω-dihydroxy polydimethylsiloxane/poly(methyl methacrylate)blends显示文摘 | Dong Jian Liu Zonglin Feng Yongbin | 2006 | J Appl Polym Sci2006，100，2： | 1 |
| 16 | Elastomers basedonα,ω-dihydroxy-polydimethylsiloxane/polystyrene blends:Morphology and mechanical properties显示文摘 | Dong Jian Liu Zonglin Cao Xiaoqun | 2006 | J Appl Poly Sci2006，101，4： | 1 |
| 17 | Preparation,mor-phology,and mechanical properties of elastomers based onpolydimethylsiloxane/polystyrene blends显示文摘 | Dong Jian Zhang Naiqiang Liu Zonglin | 2009 | J Appl Poly Sci2009，112，2： | 1 |
| 18 | Preparation of soap-free cationic emulsion using polymerizable surfactant 显示文摘 | Jin Liqiang Liu Zonglin Xu Qinghua | 2006 | Journal of Applied Polymer Science2006，99，3： | 1 |
| 19 | Noise reduction for temperature-sensitive paint measurement contaminated by strong background radiation in a high enthalpy hypersonic tunnel显示文摘The strong background radiation in high enthalpy hypersonic shock tunnels has posed severe challenges for measurement using luminescent coatings.We proposed a solution for reducing background radiation from time-resolved temperature-sensitive paint(TSP)measurement in a hypersonic flow with Ma=6.5 and T_(0)=3525 K.The TSP was applied on an inlet ramp model,and the images were taken by a high-speed camera at 2 kHz under a modulated excitation.The strong background radiation led to a low signal-to-noise ratio and significant errors for the first half of the 130-ms test duration.Accordingly,three noise reduction methods were developed and evaluated based on temporal reconstruction,spatial reconstruction and robust principal component analysis(RPCA),respectively.The RPCA method showed the best performance that successfully recovered high-quality TSP data for a majority of test duration(t≥40 ms). | Di Peng Xu Liu Lingrui Jiao Ziyan Li Xin Wen Chaokai Yuan Guilai Han Yunfeng Liu Yingzheng Liu Zonglin Jiang | 2021 | Acta Mechanica Sinica2021，37，1： | 1 |
| 20 | Synthesis and application of an amphoteric acrylic polyelectrolyte as a retanning agent 显示文摘 | Jin Liqiang Liu Zonglin Xu Qinghua | 2004 | JSLTC2004，88，3： | 1 |
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