Results 51 to 60 of about 4,282 (226)

Wavelet-based Adaptive Techniques Applied to Turbulent Hypersonic Scramjet Intake Flows

, 2013
The simulation of hypersonic flows is computationally demanding due to large gradients of the flow variables caused by strong shock waves and thick boundary or shear layers.
Behr, Marek, Bosco, Arianna, Frauholz, Sarah, Müller, Siegfried, Reinartz, Birgit U.   +4 more
core   +1 more source

A Review of Research on the Thermo‐Force Characteristics of Scramjet Engine Wall Based on Neural Networks

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
With the development of high‐performance computing and advanced experimental methods, data‐driven machine learning, especially neural network technology, has shown great potential in fluid mechanics research and has become a fourth paradigm research tool.
Chen Qi, Wang Chenglong, Li Binhao, Lin Yuan, Zhou Zibo, Jin Wenzhong, Geng Chen   +6 more
wiley   +1 more source

A Review on High‐Speed Electromagnetic Flow Control and Applications Considering Numerical Methods, Simulations, and Experimental Research Data

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
Background: Electromagnetic flow control is crucial in hypersonic gas dynamics, with key aspects of boundary layer electromagnetic flow control reviewed, focusing on numerical methods, simulations, and experimental research. Numerical Methods: Challenges such as numerical stiffness and instability arise from the coupling of electromagnetic fields with ...
Yang Du, Jun Liu, Hao Chen
wiley   +1 more source

Fuel Reactivity Controlled Autoignition and Combustion Characteristics in a Supersonic Combustor With Different Turbulence Models

International Journal of Aerospace Engineering, Volume 2025, Issue 1, 2025.
The choice of turbulence model significantly impacts the prediction of the supersonic combustion flow field. In this study, the transient autoignition process and steady supersonic combustion performance of methane fuel with adjustable reactivity in a scramjet combustor were numerically investigated, employing different turbulence models including ...
Zihan Wang, Qi Luo, Yifan Lv, Zuming Liu, Ziang Han, Xiaojie Li, William W. Liou   +6 more
wiley   +1 more source

Control Oriented Model for Expander Cycle Scramjet

MATEC Web of Conferences, 2019
As a efficient and simple design, expander cycle is widely applied in LRE engineering, but it is seldomly used on scramjet research. In order to establish a complete mathematical model for expander cycle scramjet, a control-oriented model for expander ...
Zhao Zhelong, Wu Xianyu
doaj   +1 more source

Structural evolution and oxidation resistance of polysilazane‐derived SiCN–HfO2 ceramics

Journal of the American Ceramic Society, Volume 107, Issue 3, Page 1657-1668, March 2024.
Abstract Polymer‐derived SiCN materials have great application potential in high‐temperature environments. In the current work, SiCN ceramics were tailored with Hf incorporation through doping of a molecular precursor in the preceramic polymer. The ceramics remained in a single amorphous phase up to 900°C.
Rahul Anand, Kathy Lu, Bibhuti B. Nayak, Shantanu K. Behera   +3 more
wiley   +1 more source

Effect of Bluff Body Attributes on Afterburner Combustion Characteristics of a Boron Solid Rocket Scramjet

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
In order to improve the combustion efficiency of boron‐containing primary gas in the secondary combustion chamber of a solid rocket scramjet and improve engine performance, the effects of different types of blunt bodies, number of rear blunt bodies, and distance between front and rear blunt bodies on the combustion performance of the secondary ...
Jiang Ling, Chaoqi Xu, Yihua Xu, Haijun Sun, Jiaqiang E.   +4 more
wiley   +1 more source

CFD Investigation of Supersonic Scramjet Exhaust Geometry for Emission Reduction and Sustainable Hypersonic Propulsion [PDF]

EPJ Web of Conferences
This study employs CFD analysis to optimize the scramjet exhaust divergent angle with the aim of improving propulsion efficiency and reducing environmental impact in hypersonic flight.
Paramadhayalan P., Purushothaman S., Ravi theja M.S., S Vasanthaseelan, Lalitha Saravanan A., James Raj Deepak, Sivabalan S., Raman Arasu, Baskar S.   +8 more
doaj   +1 more source

Machine Learning‐Based Backpressure Unstart Prediction and Warning Method for Combined Cycle Engine Hypersonic Inlet‐Oriented Wide Speed Range

International Journal of Aerospace Engineering, Volume 2024, Issue 1, 2024.
Inlet unstart prediction and warning are strictly crucial to the operation of hypersonic engines, especially for combined cycle engines where implementation across a wide speed range poses significant challenges. This paper proposes a realization method that involves constructing the conditions of critical backpressure ratios for the inlet unstart and ...
Ke Min, Tanbao Hong, Zejun Cai, Lianchen Yu, Chengxiang Zhu, Jianping Zeng, Gautam Choubey   +6 more
wiley   +1 more source

Study of combustion flow field in a scramjet engine under inflow oscillation variations based on OpenFOAM

Case Studies in Thermal Engineering
In this study, a compressible supersonic numerical model was established based on the open-source computational fluid dynamics software OpenFOAM. The supersonic air inflow was set in sinusoidal variation and gas hydrogen was employed as fuel for the DLR ...
Changhao Wang, Zhe Fang, Xin He, Xing Zheng, Jing Yang, Rui Xue, Xiangrui Zou   +6 more
doaj   +1 more source