Results 31 to 40 of about 385,605 (249)

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, YANG Yongneng, LIU Qi, YANG Haibin, ZHANG Wei   +4 more
doaj   +1 more source

Effects of Mach Number and Magnetic Fields on Performance of MHDG in Nozzle

Journal of Applied Science and Engineering
The technique of magnetohydrodynamic (MHD) power generation has attracted a lot of interest as a potential means of improving the effectiveness and performance of hypersonic vehicle.
Li Hao, Huang Hulin, Zhu Guiping, Zhang An   +3 more
doaj   +1 more source

Secondary flow in compressible turbulent flow through a square duct with an adiabatic wall

Nihon Kikai Gakkai ronbunshu, 2015
The compressible turbulent flows through a square duct including an adiabatic bottom-wall with three Mach numbers, M = 1,1.5,2 are investigated using the direct numerical simulation.
Masayoshi OKAMOTO, Toshihiro MORIMURA
doaj   +1 more source

Low Mach Number Modeling of Type Ia Supernovae

, 2005
We introduce a low Mach number equation set for the large-scale numerical simulation of carbon-oxygen white dwarfs experiencing a thermonuclear deflagration.
A. S. Almgren, C. A. Rendleman, J. B. Bell, M. Zingale, Pember R. B., Rehm R. G.   +5 more
core   +3 more sources

Study on the influence of geometric dimensions on the profile design of flexible nozzle in wind tunnel

Xibei Gongye Daxue Xuebao
With the numerical simulation method, the nozzle design results on a basic model and a scaled model are studied through analyzing symmetric plane Mach number distribution, density gradient distribution and central axis Mach number distribution curve in ...
XU Bingbing, PENG Qiang, CHEN Jiming, PEI Haitao   +3 more
doaj   +1 more source

A Multi-Mode Dynamic Fusion Mach Number Prediction Framework

Aerospace
The precise control of Mach numbers in supersonic and hypersonic compressor wind tunnel systems is a critical challenge in aerodynamic research. Although existing studies have improved prediction accuracy to some extent through machine learning methods ...
Luping Zhao, Weihao Li, Wentao Xu
doaj   +1 more source

Analysis of the aerodynamic characteristics of an ejection seat system using computational fluid dynamics

Frontiers in Mechanical Engineering, 2023
In the present work, an investigation of the aerodynamic characteristics of an ejection seat occupant is carried out using the commercially available computational fluid dynamics software ANSYS Fluent.
Md. Mahbubur Rahman, Ved Prakash, Sunil Chandel, D. G. Thakur, Robert Čep, Nitin Khedkar, Sachin Salunkhe, Emad S. Abouel Nasr   +7 more
doaj   +1 more source

Subsonic and Transonic Mach Number Tracking Control Strategy Design and Application in an Intermittent Wind Tunnel

IEEE Access
In order to ensure the quality of test data, the Mach number control deviation should be kept within a given range during the continuous-traverse mode force measurement test in a wind tunnel.
Liebo Ma, Cheng Yan, Bo Xiong, Liang Wang   +3 more
doaj   +1 more source

Effect of Mach number on the structure of turbulent spots [PDF]

, 2006
Direct numerical simulations have been performed to study the dynamics of isolated turbulent spots in compressible isothermal-wall boundary layers. Results of a bypass transition scenario at Mach 2, 4 and 6 are presented.
Krishnan, L., Sandham, N.D.
core   +1 more source

A Low Mach Number Model for Moist Atmospheric Flows

, 2015
We introduce a low Mach number model for moist atmospheric flows that accurately incorporates reversible moist processes in flows whose features of interest occur on advective rather than acoustic time scales. Total water is used as a prognostic variable,
Almgren, Ann, Bell, John, Duarte, Max
core   +2 more sources