scholarly journals Effect of Off-Body Laser Discharge on Drag Reduction of Hemisphere Cylinder in Supersonic Flow

2017 ◽  
Author(s):  
Nadia Kianvashrad ◽  
Doyle D. Knight ◽  
Stephen P. Wilkinson ◽  
Amanda Chou ◽  
Robert A. Horne ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Laser Discharge

scholarly journals Effect of Off-Body Laser Discharge on Drag Reduction of Hemisphere Cylinder in Supersonic Flow-Part II

2018 ◽  
Author(s):  
Nadia Kianvashrad ◽  
Doyle D. Knight ◽  
Stephen P. Wilkinson ◽  
Amanda Chou ◽  
George B. Beeler ◽  
...  
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Laser Discharge ◽  
Flow Part

scholarly journals Numerical Simulation of Supersonic Carman Curve Bodies with Aerospike

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
HaiLong Zhao ◽  
Ke Peng ◽  
ZePing Wu ◽  
WeiHua Zhang ◽  
JiaWei Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Supersonic Flow ◽  
Drag Reduction ◽  
Numerical Simulations ◽  
Reduction Methods ◽  
Reduction Effect ◽  
Supersonic Vehicles

Drag reduction is one of the important problems for the supersonic vehicles. As one of the drag reduction methods, aerospike has been used in some equipment because of its good drag reduction effect. In this paper, the numerical simulations of Carman curve bodies with different lengths of the aerospike and different radius of the flat cylindrical aerodisk in supersonic flow freestream are investigated. Based on the numerical simulations, the mechanism of drag reduction of the aerospike is discussed. The drag reduction effect influence of the parameters of the aerodisk radius and the aerospike length on the Carman curve body is analyzed. The aerodisk radius within a certain range is helpful for the drag reduction. The change of length of the aerospike has little effect on the drag of Carmen curve bodies. The drag reduction effect of the same aerospike becomes worse with the increase of the incoming Mach number.

Estimation of energy consumption for body drag reduction in a supersonic flow

1992 ◽  
Vol 63 (6) ◽  
pp. 1171-1175 ◽  
Author(s):  
V. Yu. Borzov ◽  
I. V. Rybka ◽  
A. S. Yur'ev
Keyword(s):  
Energy Consumption ◽  
Supersonic Flow ◽  
Drag Reduction ◽  
Body Drag

Drag reduction of perforated axisymmetric bodies in supersonic flow

1985 ◽  
Vol 22 (6) ◽  
pp. 663-665 ◽  
Author(s):  
Eugen Serbanescu ◽  
George Savu
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Axisymmetric Bodies

scholarly journals Influence of Laser Energy Deposition Conditions on the Drag of A Sphere in Supersonic Flow

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3914
Author(s):  
Seihwan Kim ◽  
Hyoung Jin Lee
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Energy Deposition ◽  
Laser Energy ◽  
The Body ◽  
Focal Region ◽  
Reflected Shock ◽  
Frequency Laser ◽  
Unsteady Numerical Simulation ◽  
Reduction Characteristics

In the present study, a two-dimensional axisymmetry unsteady numerical simulation that implements high-frequency laser energy deposition was performed to understand its influence on drag reduction in supersonic flow. The energy deposition was modeled as the increase of the temperature inside the focal region. The drag reduction characteristics were investigated by changing the frequency of the deposition, the distance between the focus of the deposition and the body, and the power of the laser. The results showed that drag could be reduced by 60% when there was a single energy deposition. As the operating frequency increased, up to 70% drag reduction was obtained. When the laser energy was deposed more frequently than 75 kHz, the normalized drag converged regardless of the deposition scenario, which resulted from the multiple interactions between the blast wave and the reflected shock. A similar tendency was found from the results of various focal distances. According to the results of this study on the effect of the deposition energy, it is expected to achieve the same effect as with low energy by increasing the frequency of the deposition.

Base Drag Reduction and Generation of the Lifting Force Using a Microwave Discharge in a Supersonic Flow

2020 ◽  
Vol 65 (8) ◽  
pp. 1233-1238
Author(s):  
V. L. Bychkov ◽  
L. P. Grachev ◽  
I. I. Esakov ◽  
A. V. Semenov
Keyword(s):  
Supersonic Flow ◽  
Drag Reduction ◽  
Microwave Discharge ◽  
Lifting Force ◽  
Base Drag
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