Transition Prediction in a RANS Solver based on Linear Stability Theory for Complex Three-Dimensional Configurations

2018 ◽  
Author(s):  
Yayun Shi ◽  
Raphael Gross ◽  
Charles A. Mader ◽  
Joaquim R. R. A. Martins
Keyword(s):  
Linear Stability ◽  
Stability Theory ◽  
Three Dimensional ◽  
Linear Stability Theory ◽  
Transition Prediction

Automatic Transition Prediction in a Navier–Stokes Solver Using Linear Stability Theory

AIAA Journal ◽  
2021 ◽  
pp. 1-18
Author(s):  
Jan-Sören Fischer ◽  
Bambang I. Soemarwoto ◽  
Edwin T. A. van der Weide
Keyword(s):  
Linear Stability ◽  
Stability Theory ◽  
Linear Stability Theory ◽  
Navier Stokes ◽  
Transition Prediction

scholarly journals Implementation of Linear Stability Theory on Hollow Cone-shaped Liquid Sheet

2020 ◽  
Vol 64 (3) ◽  
pp. 179-188
Author(s):  
Hadiseh Karimaei ◽  
Ramin Ghorbani ◽  
Seyed Mostafa Hosseinalipour
Keyword(s):  
Linear Stability ◽  
Stability Theory ◽  
Three Dimensional ◽  
Liquid Sheet ◽  
Linear Stability Theory ◽  
Gas Flows ◽  
Rocket Engines ◽  
Hollow Cone ◽  
Liquid Sheets ◽  
Centrifugal Injector

Surface instability of a swirling liquid sheet emanating from a centrifugal injector in presence of external and internal gas flows is studied in this paper. A three-dimensional flow for the liquid sheet and two-dimensional flows for external and internal gas flows are considered. The set of equations involved in this analysis differs from the earlier analyzes. In previous studies, a cylindrical liquid sheet has been considered to implement the linear theory but in this study, the linear stability theory is implemented on a cone-shaped liquid sheet for different cone angles. Actually more over than axial and tangential movements, the radial movements of liquid sheet and gas flows are considered in the present model. Due to complexity of the derived governing equations, semi-analytical and numerical methods were applied to solve them. The case study is oxidizer injector of rocket engines. Implementation of linear stability theory on a hollow cone-shaped liquid sheet better can predict instability phenomenon than the general linear stability analysis for this type of liquid sheets. The results show very close agreement with available experimental data.

scholarly journals Convolutional neural network for transition modeling based on linear stability theory

2020 ◽  
Vol 5 (11) ◽  
Author(s):  
Muhammad I. Zafar ◽  
Heng Xiao ◽  
Meelan M. Choudhari ◽  
Fei Li ◽  
Chau-Lyan Chang ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Linear Stability ◽  
Stability Theory ◽  
Linear Stability Theory ◽  
Transition Modeling
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