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| 1 | Numerical study on the correlation of transonic single-degree-of-freedom flutter and buffet显示文摘Transonic single-degree-of-freedom(SDOF) flutter and transonic buffet are the typical and complex aeroelastic phenomena in the transonic flow. In this study, transonic aeroelastic issues of an elastic airfoil are investigated using Unsteady Reynolds-Averaged Navier-Stokes(URANS) equations. The airfoil is free to vibrate in SDOF of pitching. It is found that, the coupling system may be unstable and SDOF self-excited pitching oscillations occur in pre-buffet flow condition, where the free-stream angle of attack(AOA) is lower than the buffet onset of a stationary airfoil. In the theory of classical aeroelasticity, this unstable phenomenon is defined as flutter. However, this transonic SDOF flutter is closely related to transonic buffet(unstable aerodynamic models) due to the following reasons. Firstly, the SDOF flutter occurs only when the free-stream AOA of the spring suspended airfoil is slightly lower than that of buffet onset, and the ratio of the structural characteristic frequency to the buffet frequency is within a limited range. Secondly, the response characteristics show a high correlation between the SDOF flutter and buffet. A similar 'lock-in' phenomenon exists, when the coupling frequency follows the structural characteristic frequency. Finally, there is no sudden change of the response characteristics in the vicinity of buffet onset, that is, the curve of response amplitude with the free-stream AOA is nearly smooth. Therefore, transonic SDOF flutter is often interwoven with transonic buffet and shows some complex characteristics of response, which is different from the traditional flutter. | GAO ChuanQiang ZHANG WeiWei LIU YiLang YE ZhengYin JIANG YueWen | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，8： | 4 |
| 2 | Abnormal changes of dynamic derivatives at low reduced frequencies显示文摘A number of studies have found that abnormal changes of dynamic derivatives occurred at very low reduced frequencies, but its inducement mechanism is not very clear. This paper has researched the abnormal changes and analyzed the influence on some parameters by solving the unsteady flow around forced oscillation airfoils based on Navier-Stokes equations. Results indicate that when the reduced frequency approaches to zero, the dynamic derivatives obtained by the numerical method will diverge. We have also proven it in theory that this phenomenon is not physical but completely caused by numerical singularity. Furthermore, the abnormal phenomenon can be effectively mitigated by using the time spectral method to solve the aerodynamic forces and the integral method to obtain the dynamic derivatives. When the reduced frequency is in the range of 0.001–0.01, the dynamic derivative maintains nearly unchanged for the whole speed region. This study can provide a reference for the reasonable choice of the reduced frequency in calculations and experiments of dynamic derivatives. | Weiwei ZHANG Yiming GONG Yilang LIU | 2018 | Chinese Journal of Aeronautics2018，31，7： | 2 |
| 3 | Infrared spectroscopy and chemometrics for the starch and protein prediction in irradiated rice显示文摘 | Yongni Shao Yilang Cen Yong He Fei Liu | 2010 | Food Chemistry2010，，4： | 1 |
| 4 | Immunostimulant nanomodulator boosts antitumor immune response in triple negative breast cancer by synergism of vessel normalization and photothermal therapy显示文摘Tumor vascular dysfunction and immune suppression predict poor outcomes of tumor therapy.Combination of photothermal therapy(PTT)and vessel normalization with tumor immunotherapy is promising to augment antitumor benefit.Herein,we develop a potential immunostimulatory nanomodulator for treatment of triple-negative breast cancer(TNBC)treatment via synergism of PTT,vessel normalization,and priming of tumoral suppressive immune microenvironment by blocking transforming growth factor-β(TGF-β)pathway.The nanomodulator,namely Vac@Apt@BPs,is developed by conjugation of TGF-βinhibitor Vactosertib(Vac)and nucleolin-recognizing aptamer(Apt)on the surface of black phosphorus nanoparticles(BPs).Vac@Apt@BPs show good accumulation in TNBC via aptamer-induced active targeting of TNBC.Via the blockade of TGF-βsignaling,Vac@Apt@BPs effectively inhibit the formation of tumor neovascular,and normalize the vessels to recover vascular integrity and alleviate the hypoxia stress.Together with the tumor eradication and immunogenic cell death via PTT,robust immune response was boosted by promoted maturation of dendritic cells,suppression of regulatory T cells,and stimulation of effective T cells.This synergistic therapeutic strategy potentially suppresses the growth of TNBC in mice. | Hao Jiang Yilang He Jia Zhao Ruimin Chang Hailun He Tan Li Xingyu Zhang Bo Shu Wenxuan Zhang Huaiyu Wang Jing Liu Shubing Zhang Yuetao Zhao | 2023 | Nano Research2023，16，8： | 0 |
| 5 | Drug Abuse in China显示文摘 | ZHAO CHENGZHENG LIU ZHIMIN ZHAO DONG LIU YANHONG LIANG JIANHUI TANG YILANG LIU ZEYUAN ZHENG JIWANG | 2005 | 中国生物学文摘2005，19，8： | 0 |
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