Numerical analysis on interactions of vortex, shock wave, and exothermal reaction in a supersonic planar shear layer laden with droplets

2018 ◽  
Vol 30 (3) ◽  
pp. 036101 ◽  
Author(s):  
Zhaoxin Ren ◽  
Bing Wang ◽  
Longxi Zheng
Keyword(s):  
Shock Wave ◽  
Numerical Analysis ◽  
Shear Layer ◽  
Exothermal Reaction ◽  
Planar Shear

Flow Geometry Effects on the Turbulent Mixing Efficiency

2006 ◽  
Vol 128 (4) ◽  
pp. 874-879 ◽  
Author(s):  
Roberto C. Aguirre ◽  
Jennifer C. Nathman ◽  
Haris C. Catrakis
Keyword(s):  
Shear Layer ◽  
Turbulent Mixing ◽  
Large Scale ◽  
Mixture Fraction ◽  
Mixing Efficiency ◽  
Developed Turbulence ◽  
Planar Shear ◽  
Flow Geometry ◽  
Schmidt Numbers ◽  
Geometry Effects

Flow geometry effects are examined on the turbulent mixing efficiency quantified as the mixture fraction. Two different flow geometries are compared at similar Reynolds numbers, Schmidt numbers, and growth rates, with fully developed turbulence conditions. The two geometries are the round jet and the single-stream planar shear layer. At the flow conditions examined, the jet exhibits an ensemble-averaged mixing efficiency which is approximately double the value for the shear layer. This substantial difference is explained fluid mechanically in terms of the distinct large-scale entrainment and mixing-initiation environments and is therefore directly due to flow geometry effects.

scholarly journals Numerical Analysis of Interaction between Single Bubble and Shock Wave.

1994 ◽  
Vol 60 (577) ◽  
pp. 2976-2983
Author(s):  
Hiroyuki Takahira ◽  
Hisashi Masubuchi ◽  
Teruaki Akamatsu
Keyword(s):  
Shock Wave ◽  
Numerical Analysis ◽  
Single Bubble

scholarly journals Numerical Analysis of the Behavior of Shock Wave in Spheroid Vessel

2010 ◽  
Vol 4 (4) ◽  
pp. 317-328 ◽  
Author(s):  
Yosuke Nishimura ◽  
Naoki Kawaji ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
Numerical Analysis

Numerical Analysis of Concrete Fracture under Shock Wave Loading

2021 ◽  
Vol 24 (1) ◽  
pp. 40-45
Author(s):  
P. A. Radchenko ◽  
S. P. Batuev ◽  
A. V. Radchenko
Keyword(s):  
Shock Wave ◽  
Numerical Analysis ◽  
Shock Wave Loading ◽  
Concrete Fracture ◽  
Wave Loading

Wall-Pressure Fluctuations Inside Attached Cavitation

2021 ◽  
Author(s):  
Changchang Wang ◽  
Guoyu Wang ◽  
Mindi Zhang ◽  
Qin Wu
Keyword(s):  
Shock Wave ◽  
Shear Layer ◽  
High Frequency ◽  
Pressure Fluctuations ◽  
Wall Pressure ◽  
Cloud Cavitation ◽  
Unsteady Pressure ◽  
Wall Pressure Fluctuations ◽  
Kurtosis Factor ◽  
Skewness And Kurtosis

Abstract This study experimentally investigates the statistics of wall-pressure fluctuations and their source inside attached cavitation under different cavity regimes. Experiments were conducted in the divergent section of a convergent-divergent channel at a constant Reynolds number of Re = 7.8 × 105 based on throat height, and different cavitation numbers σ = 1.18, 0.92, 0.82 and 0.78. Four high-frequency unsteady pressure transducers were flushed-mounted in the divergent section downstream the throat where cavitation develops to sample the unsteady pressure signals induced by cavity behaviors. Flow visualization and wall-pressure measurement in high frequency on the order of MHz were employed using a synchronizing sampling technique. Results are presented for sheet/cloud cavitating flows. Specifically, sheet cavitation with both inception shear layer and fully cavitated shear layer and cloud cavitation under re-entrant jet dominated shedding and shock wave dominated shedding are studied. Compared with re-entrant jet, the interactions between shock wave and cavity could induce pressure peaks with high magnitude within cavity, which will collapse the local vapor along its propagating path and reduce local void fraction. Furthermore, statistics analysis shows that within the cavity, wall-pressure fluctuations increase with the distance to cavity leading edge increase in the first half of cavity length, and the moments of the probability density distribution skewness and kurtosis factor decrease, indicating the asymmetry and intermittency of wall-pressure fluctuation signals decrease. In shock wave dominated cavity shedding condition, the skewness and kurtosis factor increase. These results can provide data to improve the accuracy of turbulence modeling in numerical simulation of turbulent cavitating flow.

scholarly journals A numerical analysis of mass transfer in a plane shear layer.

1987 ◽  
Vol 30 (263) ◽  
pp. 785-791 ◽  
Author(s):  
Tatsuya HASEGAWA ◽  
Shigeki YAMAGUCHI ◽  
Norio OHIWA
Keyword(s):  
Mass Transfer ◽  
Numerical Analysis ◽  
Shear Layer ◽  
Plane Shear

0602 Numerical Analysis on Ignition Phenomena by Shock Wave

2009 ◽  
Vol 2009 (0) ◽  
pp. 249-250
Author(s):  
Eiichiro YAMAMOTO ◽  
Daisuke SHINYA ◽  
Tadayoshi SUGIMURA
Keyword(s):  
Shock Wave ◽  
Numerical Analysis
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