Full Text:   <59>

CLC number: 

On-line Access: 2024-05-01

Received: 2023-12-19

Revision Accepted: 2024-03-18

Crosschecked: 0000-00-00

Cited: 0

Clicked: 134

Citations:  Bibtex RefMan EndNote GB/T7714

-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE A 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/jzus.A2300641


Numerical simulation of three-dimensional supersonic asymmetric truncated nozzle based on k-kL algebraic stress model


Author(s):  Gang WANG, Shuai ZHANG, Jifa ZHANG, Yao ZHENG

Affiliation(s):  School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   jfzhang@zju.edu.cn

Key Words:  Supersonic nozzle, Turbulence model, Numerical simulation, Performance analysis


Gang WANG, Shuai ZHANG, Jifa ZHANG, Yao ZHENG. Numerical simulation of three-dimensional supersonic asymmetric truncated nozzle based on k-kL algebraic stress model[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .

@article{title="Numerical simulation of three-dimensional supersonic asymmetric truncated nozzle based on k-kL algebraic stress model",
author="Gang WANG, Shuai ZHANG, Jifa ZHANG, Yao ZHENG",
journal="Journal of Zhejiang University Science A",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300641"
}

%0 Journal Article
%T Numerical simulation of three-dimensional supersonic asymmetric truncated nozzle based on k-kL algebraic stress model
%A Gang WANG
%A Shuai ZHANG
%A Jifa ZHANG
%A Yao ZHENG
%J Journal of Zhejiang University SCIENCE A
%V -1
%N -1
%P
%@ 1673-565X
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300641

TY - JOUR
T1 - Numerical simulation of three-dimensional supersonic asymmetric truncated nozzle based on k-kL algebraic stress model
A1 - Gang WANG
A1 - Shuai ZHANG
A1 - Jifa ZHANG
A1 - Yao ZHENG
J0 - Journal of Zhejiang University Science A
VL - -1
IS - -1
SP -
EP -
%@ 1673-565X
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2300641


Abstract: 
The nozzle is a critical component responsible for generating most of the net thrust in a scramjet engine. The quality of its design directly affects the performance of the entire propulsion system. However, most turbulence models struggle to make accurate predictions for subsonic and supersonic flows in nozzles. In this study, we explored a novel model—the algebraic stress model k-kL-ARSM+J—to enhance the accuracy of turbulence numerical simulations. This new model was used to conduct numerical simulations of the design and off-design performance of a three-dimensional supersonic asymmetric truncated nozzle designed in our laboratory, with the aim of providing a realistic pattern of changes. The research indicate that, compared to linear eddy viscosity turbulence models such as k-kL and SST, the k-kL-ARSM+J algebraic stress model shows better accuracy in predicting the performance of supersonic nozzles. Its predictions were identical to the experimental values, enabling precise calculations of the nozzle. The performance trends of the nozzle are as follows: as the inlet Mach number increases, both thrust and pitching moment increase, but the rate of increase slows down. Lift peaks near the design Mach number and then rapidly decreases. With increasing inlet pressure, the nozzle thrust, lift, and pitching moment all show linear growth. As the flight altitude rises, the internal flow field within the nozzle remains relatively consistent due to the same supersonic nozzle inlet flow conditions. However, external to the nozzle, the change in external flow pressure results in the nozzle exit transitioning from over-expanded to under-expanded, leading to a shear layer behind the nozzle that initially converges towards the nozzle center and then diverges.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE