Results 31 to 40 of about 30,241 (212)

Smooth leading edge transition in hypersonic flow. [PDF]

, 1999
The boundary layer transition along the attachment line of a smooth swept circular cylinder in hypersonic flow is investigated in a blowdown wind tunnel. A wide range of spanwise Mach numbers Me (3.28 to 6.78) is covered with the help of different models
Alziary De Roquefort, T., Benard, Emmanuel, Alziary de Roquefort, Thierry, Gaillard, L.   +3 more
core   +1 more source

Thermal Protection Mechanism of a Novel Adjustable Non-Ablative Thermal Protection System for Hypersonic Vehicles

Aerospace, 2022
In order to improve the thermal protection performance of the active thermal protection system (TPS) based on the spike and jet, an adjustable non-ablative thermal protection system, of which the spike can be rotated in the direction of the free stream ...
Bin Chang, Jie Huang, Wei-Xing Yao
doaj   +1 more source

Study on Trajectory Optimization of Hypersonic Vehicle Based on Neural Network

Frontiers in Energy Research, 2022
For the horizontal take-off hypersonic cruise aircraft, research on the combined design method of multi-section was carried out, the main design parameters of different sections were analyzed, the parametric design model of the flight path was ...
Feichao Cai, Xing Huang
doaj   +1 more source

A Robust Control Method for the Trajectory Tracking of Hypersonic Unmanned Flight Vehicles Based on Model Predictive Control

Drones
Hypersonic unmanned flight vehicles have complex dynamic characteristics, such as nonlinearity, strong coupling, multiple constraints, and uncertainty.
Haixia Ding, Bowen Xu, Weiqi Yang, Yunfan Zhou, Xianyu Wu   +4 more
doaj   +1 more source

A Review of Aerodynamic Design for Wide-Speed Range Waverider Vehicle [PDF]

Hangkong bingqi
As a hypersonic aerodynamic configuration that can break through the lift-drag ratio barrier, waverider configuration is an important candidate for wide-speed reusable aircraft. Therefore.
Wang Chenhang, Jin Liang, Zhao Zhentao, Xie Zan, Huang Wei
doaj   +1 more source

Coupled heat transfer characteristics on gas-solid reacting interface in carbon-oxygen dissociating environment for spacecraft entry flow

Journal of Thermal Science and Technology, 2020
High-enthalpy dissociating aerodynamic environment during high-speed spacecraft entries brings new challenges to the prediction of heat transfer characteristics on the surface of thermal protection system.
Xiaofeng YANG, Yanxia DU, Shenshen LIU, Guangming XIAO, Yewei GUI, Wei LIU   +5 more
doaj   +1 more source

Assessment of Radiative Heating for Hypersonic Earth Reentry Using Nongray Step Models

Aerospace, 2022
Accurate prediction of the aerothermal environment is of great significance to space exploration and return missions. The canonical Fire II trajectory points are simulated to investigate the radiative transfer in the shock layer for Earth reentry at ...
Xinglian Yang, Jingying Wang, Yue Zhou, Ke Sun   +3 more
doaj   +1 more source

Influence of injection angles on flow structures and mixing properties in a supersonic combustor at low Mach supersonic crossflow

Scientific Reports
The fuel-air mixing is of paramount importance in hypersonic air-breathing vehicles, and its performance is closely related to the fuel injection angle.
Lin Zhang, Jianhan Liang, Yi Wang, Wei Zhao, Leichao Yang   +4 more
doaj   +1 more source

Deep transfer learning for three-dimensional aerodynamic pressure prediction under data scarcity

Theoretical and Applied Mechanics Letters
Aerodynamic evaluation under multi-condition is indispensable for the design of aircraft, and the requirement for mass data still means a high cost. To address this problem, we propose a novel point-cloud multi-condition aerodynamics transfer learning ...
Hao Zhang, Yang Shen, Wei Huang, Zan Xie, Yao-Bin Niu   +4 more
doaj   +1 more source

The Effect of Fuel Injection on the Combustion Characteristics of Gas-Solid Two-Phase Gas [PDF]

Hangkong bingqi
Fuel injection significantly affects the combustion characteristics of gas-solid two-phase gas in solid rocket scramjet. The effects of fuel equivalent ratio and fuel injection port arrangement on the combustion characteristics of gas-solid two-phase gas
Zhao Libei, Ma Likun, Xia Zhixun, Feng Yunchao, Chen Binbin, Liu Yandong
doaj   +1 more source