Results 31 to 40 of about 2,387,085 (259)
Finite-rate chemistry effects in turbulent hypersonic boundary layers: A direct numerical simulation study [PDF]
Physical Review Fluids, 2021 The accurate prediction of hypersonic flows is a key challenge for the design of reentry bodies or hypersonic aircraft. Knowledge concerning the wall-bounded turbulence is especially needed.
D. Passiatore +3 more
semanticscholar +1 more source
Developing and applying Mach 4.5 nozzle in hypersonic wind tunnel
Xibei Gongye Daxue Xuebao, 2021 Mach 4.5 tests in a conventional trans-supersonic wind tunnel are often accompanied by the air liquefaction phenomenon, resulting in the low reliability of test data.
HUANG Ju +4 more
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International Journal of Aerospace Engineering, 2021 Hypersonic vehicle has gained increasing attention due to its high cruise speed and long voyage. In this paper, an enhanced Sequential Approximate Optimization method is proposed for aerodynamic optimization of a hypersonic vehicle.
Wenjie Wang +5 more
doaj +1 more source
The Physics of Fluids, 2023 The classical four-equation γ-Re transition model has presented excellent accuracy in low-speed boundary layer transition prediction. However, once the incoming flow reaches hypersonic speed, the original model is no longer applicable due to the ...
Tianxing Zhang +4 more
semanticscholar +1 more source
Adaptive Approach Phase Guidance for a Hypersonic Glider via Reinforcement Meta Learning [PDF]
AIAA SCITECH 2022 Forum, 2021 We use Reinforcement Meta Learning to optimize an adaptive guidance system suitable for the approach phase of a gliding hypersonic vehicle. Adaptability is achieved by optimizing over a range of o -nominal flight conditions including perturbation of ...
B. Gaudet +3 more
semanticscholar +1 more source
Target Detection Algorithm for Hypersonic Vehicle Based on Wideband Radar Echo Model
IEEE Access, 2019 High speed of the hypersonic vehicle can cause the noticeable scale effect and intra-pulse Doppler on radar echoes, especially under the large time-bandwidth product transmitting signal.
Zhiyong Niu, Tao Su, Jibin Zheng
doaj +1 more source
Optics Express, 2023 At hypersonic velocities, the turbulent flow field generated by an aircraft, along with its temperature distribution, leads to significant aerodynamic optical effects that severely impede the performance of internal optical systems. This study proposes a
Wenzhi Zhang +4 more
semanticscholar +1 more source
, 2018 A high-speed (2 kHz) near-infrared (1.0-1.65 mu m) multispectral pyrometer was used for noninvasive measurements of the subpixel temperature distribution near the sharp leading edge of a wing exposed to a supersonic plasma jet.
T. Fu, Jiangfan Liu, M. Duan, Sen Li
semanticscholar +1 more source
Hangkong gongcheng jinzhan, 2020 With the rapid development of hypersonic vehicle technology, the research on defense approach of the hypersonic weapons is constantly deepening. A lot of guidance law researchers made their efforts to tackle with the problem of high speed, active large ...
SUN Lei +4 more
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气体物理, 2023 The aerodynamic configuration design of wide-range hypersonic vehicle has become one of the research hotspots. The new aerodynamic configuration of high-pressure capturing wing (HCW) can meet the requirements of high volume ra-tio, high lift and high ...
Yao XIAO +4 more
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