Results 41 to 50 of about 80,594 (224)

A Compact Tunable Diode Laser Absorption Spectrometer to Monitor CO2 at 2.7 µm Wavelength in Hypersonic Flows

Sensors, 2010
Since the beginning of the Mars planet exploration, the characterization of carbon dioxide hypersonic flows to simulate a spaceship’s Mars atmosphere entry conditions has been an important issue.
Raphäel Vallon, Jacques Soutadé, Jean-Luc Vérant, Jason Meyers, Sébastien Paris, Ajmal Mohamed   +5 more
doaj   +1 more source

Simulations of Hypersonic Boundary-Layer Transition over a Flat Plate with the Spalart-Allmaras One-Equation BCM Transitional Model

Mathematics, 2022
Transitional flow has a significant impact on vehicles operating at supersonic and hypersonic speeds. An economic way to simulate this problem is to use computational fluid dynamics (CFD) codes.
Yu Chen, Nick Gibbons
doaj   +1 more source

Aerodynamic characteristics of hypersonic airfoils based on jet flow control technology

AIP Advances, 2021
Hypersonic aircraft represent an important area of aerospace development. Raising the aircraft lift-to-drag ratio, improving the efficiency of attitude control, and optimizing aerodynamic performance are important goals.
Jiachen Zhu, Zhiwei Shi, Junquan Fu, Jie Chen   +3 more
doaj   +1 more source

Preliminary Validation of the Wind Tunnel Based Flight Control System Evaluation Method

MATEC Web of Conferences, 2018
As mathematical models of aircraft aerodynamics and rudder loadings always have to be built in the hardware-in-the-loop simulation, wind tunnel based flight control system (FCS) evaluation methods were proposed in order to test and evaluate the flight ...
Huang Min, Wang Zhong-wei, Yang Xing-Bao, Guo Zhen-yun, Niu Yao-bin   +4 more
doaj   +1 more source

Starting Process of a Double-Throat Ludwieg Tube Tunnel and the Extension of Its Effective Running Time

气体物理
The Ludwieg tube wind tunnel serves as a crucial testing ground for fundamental studies of hypersonic aerodynamics. However, the quick-opening valve-started hypersonic Ludwieg tube wind tunnel has been affected by the quick-opening valve for a long time,
Chuangchuang LI, Zhiyuan LI, Zhenhui ZHANG, Jie Wu   +3 more
doaj   +1 more source

Aerodynamic Test of AGARD-B Model at Mach 10 in Arc-heated High-Enthalpy Wind Tunnel

气体物理
The test capacity of hypersonic equipment is crucial to the development of hypersonic technology. However, the maximum Mach number simulated by conventional hypersonic wind tunnel is less than 10 currently due to the insufficient heater capacity ...
Tingting ZHANG, Jian LIN, Yue GUO, Huazhen SONG, Feng JI   +4 more
doaj   +1 more source

High frequency AC electric glow discharge visualization technology and application in big diameter hypersonic low-density wind tunnel

Advances in Aerodynamics, 2021
In order to visualize the rarefied flow field in a Φ1m hypersonic low-density wind tunnel, an electric glow discharge technique based on high frequency excited power has been developed.
Wanqiu Jiang, Huacheng Qiu, Yanguang Yang, Yilei Shi, Jie Wang, Jie Li, Zhengyi Long, Chunman Mao   +7 more
doaj   +1 more source

Mach 4 Simulating Experiment of Pre-Cooled Turbojet Engine Using Liquid Hydrogen

Aerospace, 2022
This study investigated a pre-cooled turbojet engine for a Mach 5 class hypersonic transport aircraft. The engine was demonstrated under takeoff and Mach 2 flight conditions, and a Mach 5 propulsion wind tunnel test is planned.
Hideyuki Taguchi, Kenya Harada, Hiroaki Kobayashi, Motoyuki Hongoh, Daisaku Masaki, Shunsuke Nishida   +5 more
doaj   +1 more source

High‐Entropy Materials for Electromagnetic Wave Absorption and EMI Shielding

MetalMat, EarlyView.
This review unravels how compositional design, microstructure, and synthesis of high‐entropy materials converge to govern electromagnetic performance. It outlines critical knowledge gaps and future directions for EM absorption and shielding technologies.
Erdem Tevfik Özdemir, Mustafa Erol, Murat Alkan   +2 more
wiley   +1 more source

Reynolds Number Effect on Aerodynamic and Starting Characteristics of a Two-Dimensional Hypersonic Inlet

Aerospace, 2022
The Reynolds number effect induced by model scaling and inflow conditions will affect the aerodynamic and starting characteristics of a two-dimensional hypersonic inlet. This effect is investigated through a numerical simulation method.
Jun Liu, Jingzhe Chen, Huacheng Yuan
doaj   +1 more source