Results 71 to 80 of about 798 (239)

Optimization of Freestream Flow Effects on Thrust Shock Vector Control Nozzle

Journal of Applied Fluid Mechanics, 2018
The present study attempted to utilize a computational investigation to optimize the external freestream flow influence on thrust-vector control. The external flow with different Mach numbers from 0.05 to 1.1 and with optimum injection angles from 60˚ to
F. Forghany, M. Taeibi-Rahni, A. Asadollahi Ghohieh   +2 more
doaj  

Investigation on Flow Characteristics and Performance Estimation of a Hybrid SVC Nozzle

Journal of Applied Fluid Mechanics, 2020
Higher vector efficiency of fluidic thrust vectoring (FTV) technology results in less requirement on secondary flow mass, which helps to reduce the influence of secondary flow on the performance of an aero-engine.
J. Shi, Z. Wang, Z. Li, S. Xiao-lin
doaj  

Numerical simulation of a synthetic jet with OpenFoam [PDF]

, 2013
Numerical simulations of flow surrounding a synthetic jet actuating device are presented. By modifying a dynamic mesh technique available in OpenFoam-a well-documented open-source solver for fluid dynamics, detailed computations of the sinusoidal motion ...
Kazakidi, Asimina, Liu, Qiong, Medeiros, Marcello A. F., Theofilis, Vassilios   +3 more
core  

Ejecta‐Modulated Bubble Dynamics Play a Dominant Role in Stone Retropulsion

Advanced Science, EarlyView.
Stone motion during laser ablation is shown to result primarily from asymmetric cavitation bubble collapse, not from ejecta recoil. This challenges long‐standing assumptions and highlights the dominant role of bubble dynamics in laser–material interactions.
Obed S. Isaac, Arpit Mishra, Georgy N. Sankin, Junqin Chen, Pei Zhong   +4 more
wiley   +1 more source

Optimizing Solid Rocket Missile Trajectories: A Hybrid Approach Using an Evolutionary Algorithm and Machine Learning

Aerospace
This paper introduces a novel approach for modeling and optimizing the trajectory and behavior of small solid rocket missiles. The proposed framework integrates a six-degree-of-freedom (6DoF) simulation environment experimentally tuned for accuracy, with
Carlo Ferro, Matteo Cafaro, Paolo Maggiore   +2 more
doaj   +1 more source

Jet Exit Rig Six Component Force Balance [PDF]

, 2012
A new six axis air balance was delivered to the NASA Glenn Research Center. This air balance has an axial force capability of 800 pounds, primary airflow of 10 pounds per second, and a secondary airflow of 3 pounds per second. Its primary use was for the
Booth, Dennis, Castner, Raymond, Woike, Mark, Wolter, John   +3 more
core   +1 more source

Encoding Cumulation to Learn Perturbative Nonlinear Oscillatory Dynamics

Advanced Science, EarlyView.
Weak nonlinearities critically shape the long term behavior of oscillatory systems but are difficult to identify from data. A data‐driven framework is introduced to infer governing equations of weakly nonlinear oscillators from sparse and noisy observations.
Teng Ma, Ting‐Ting Gao, Wei Cui, Attilio Frangi, Gang Yan, Lin Zhao   +5 more
wiley   +1 more source

Investigation on Flow Characteristics of SVC Nozzles

Journal of Applied Fluid Mechanics, 2018
Shock vectoring control (SVC) is an important method of fluidic thrust vectoring (FTV) for aero-engine exhaust system. It behaves better on nozzle of high pressure ratio, and is considered as an alternative TV technology for a future aero-engine with ...
S. H. I. Jingwei, Z. Wang, L. Zhou, S. U. N. Xiaolin   +3 more
doaj  

Aerodynamic Characteristics of the Novel Two-Dimensional Enhanced Shock Vector Nozzle

Aerospace
Fluid thrust vectoring (FTV) control has obvious advantages in structural quality and stealth performance because of its fast response and light weight. However, improving FTV vector performance will cause a loss in engine performance due to the need to ...
Bowen Shu, Zhenghong Gao, Jiangtao Huang, Chengjun He, Haibo Zheng, Lu Xia   +5 more
doaj   +1 more source

Numerical Simulation of Fluidic Thrust Vectoring in the Conical Nozzle

Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 2020
The application of fluid injection into the divergent portion of a supersonic nozzle to release the pushed vector is an attractive alternate to conventional thrust vectoring systems. Indeed, it can replace mechanical complexes. In recent years, this new thrust vectoring technology is the subject of numerous experimental and numerical researches, and ...
Kbab Hakim, Hamitouche Toufik, Bergheul Said   +2 more
openaire   +1 more source