Numerical Simulation of IR Seeker High-Speed Flow Field and Its Influence on Ray Transmission

2012 ◽  
Vol 32 (8) ◽  
pp. 0801002
Author(s):  
江涛 Jiang Tao ◽  
丁明松 Ding Mingsong ◽  
高铁锁 Gao Tiesuo ◽  
董维中 Dong Weizhong ◽  
方艺忠 Fang Yizhong ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
High Speed ◽  
High Speed Flow ◽  
Speed Flow

scholarly journals Studies on the Visualization of High Speed Flow Field Using MRI with EPI method

1998 ◽  
Vol 118 (7-8) ◽  
pp. 851-859
Author(s):  
Hiroyuki Kikuchi ◽  
Noriyuki Okinaka ◽  
Yoshiaki Aoki ◽  
Naoyuki Kayukawa
Keyword(s):  
Flow Field ◽  
High Speed ◽  
High Speed Flow ◽  
Speed Flow

scholarly journals Features of high-speed aircraft numerical simulation

2020 ◽  
Author(s):  
M.M. Alekseeva ◽  
N.A. Brykov ◽  
I.A. Vikhrova
Keyword(s):  
Numerical Simulation ◽  
Gas Dynamics ◽  
High Speed ◽  
Simulation Method ◽  
High Speed Flow ◽  
Flight Tests ◽  
High Speeds ◽  
Physical Experiments ◽  
Speed Flow ◽  
Flow Around A Body

Currently, the creation of new high-speed aircraft is of great interest. The development of such aircraft is associated with the need for experiments and flight tests. The organization of real physical experiments in the field of high speeds is fraught with significant difficulties that can be solved using the numerical simulation method, which makes it possible to significantly simplify the process of creating new products. When developing a high-speed aircraft, it is necessary to take into account the specific aerodynamic and thermophysical features of the processes occurring on the surface of the aircraft and in the shock layer. In this paper, the features of the processes at high speeds are considered on the example of solving the external and internal problems of the gas dynamics of an aircraft. Based on the specifics of these processes, we built a mathematical model that allows us to study the aerodynamics of a high-speed flow around a body in dense layers of the atmosphere and the processes that occur in the combustion chamber.

Numerical Simulation of Non-Equilibrium Plasma Discharge for High Speed Flow Control

2016 ◽  
Vol 98 (3) ◽  
pp. 285-293 ◽  
Author(s):  
Ramakrishnan Balasubramanian ◽  
Karupannasamy Anandhanarayanan ◽  
Rajah Krishnamurthy ◽  
Debasis Chakraborty
Keyword(s):  
Numerical Simulation ◽  
Flow Control ◽  
High Speed ◽  
Plasma Discharge ◽  
High Speed Flow ◽  
Equilibrium Plasma ◽  
Speed Flow ◽  
Non Equilibrium

scholarly journals Numerical Prediction and Risk Analysis of Hydraulic Cavitation Damage in a High-Speed-Flow Spillway

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Wuyi Wan ◽  
Bin Liu ◽  
Awais Raza
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Concrete Surface ◽  
Numerical Approach ◽  
High Speed Flow ◽  
Local Pressure ◽  
Numerical Result ◽  
Speed Flow ◽  
Cavitation Region ◽  
Computational Fluid Dynamics Cfd

Hydraulic cavitation is usually an undesirable phenomenon since it can damage the concrete surface of a chute spillway. In order to numerically predict the potential cavitation of a high-speed flow in a chute spillway, a compound risk assessment is proposed by combining probabilistic analysis with a computational fluid dynamics (CFD) technique. Based on the local pressure and flow velocity of the nodes, the traditional cavitation number is introduced to characterize the possibility of cavitation. The distribution of cavitation numbers was obtained according to the numerical simulation of the flow field in an open spillway. A hydraulic experiment was conducted to validate the numerical result. As a result, the potential cavitation region could be shown by visualizing the numerical result. Comparing the numerical results with the experimental results, hydraulic model validates the numerical simulation. The proposed numerical approach is economical and saves time; moreover, it can provide greater information about the potential cavitation region. This approach is more convenient for designers in their efforts to optimize the spillway shape and protect the concrete structure from cavitation erosion while maintaining lower costs and achieving higher visualization.

Method of high speed flow field influence and restrain on laser communication

2013 ◽  
Author(s):  
Li-xin Meng ◽  
Chun-hui Wang ◽  
Cun-zhu Qian ◽  
Shuo Wang ◽  
Li-zhong Zhang
Keyword(s):  
Flow Field ◽  
High Speed ◽  
Laser Communication ◽  
High Speed Flow ◽  
Speed Flow ◽  
Field Influence

scholarly journals A Study on the Air Cavity under a Stepped Planing Hull

2019 ◽  
Vol 7 (12) ◽  
pp. 468 ◽  
Author(s):  
Dongmei Yang ◽  
Zhiyuan Sun ◽  
Yi Jiang ◽  
Zeyang Gao
Keyword(s):  
Flow Field ◽  
Pressure Distribution ◽  
High Speed ◽  
General Procedure ◽  
Shape Evolution ◽  
High Speed Flow ◽  
Air Cavity ◽  
Speed Flow ◽  
Wetted Area ◽  
Volume Method

Based on the FVM (finite volume method) numerical method, the flow field around the stepped planing hull in Taunton series was simulated. According to the general procedure of numerical uncertainty analysis, the numerical uncertainty in the high-speed flow field simulation of the stepped planing hull was discussed. Combined with the wave-making characteristics of the hull, the generation mechanism, shape evolution of air cavity, and the pressure distribution characteristics under the influence of the cavity, focuses on the variation of the flow around the stepped planing when the hull is in the triangle planing stage. Numerical results suggest that, as the air cavity enlarges, the cover rate of the air cavity can rise up to 77.8% of the whole wetted surface of the planing hull bottom. While, in the triangle planing stage, there is additional wetting at the aft bilge, which leads to the decrease of the air cavity rate and the increase of the wetted area. At the same time, the pressure distribution concentrates to the center of gravity.

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