Document Type
Article
Publication Date
4-2025
Department
Department of Materials Science and Engineering
Abstract
The turbulent characteristics of the top-blown Laval nozzle and the influence of pressure and Mach number were studied through numerical simulation. With 2.72% error between the results and the empirical formula, the results are reliable. Nozzle fluid is influenced by pipe structure, causing pressure and density to drop as speed increases. Differences in pressure and velocity between the jet and surrounding gas lead to jet velocity attenuation, flow expansion, deflection, and eddy currents. The optimal top blowing pressure is 0.6 MPa, and the center velocity and width of the jet are 345 m/s and 0.124 m, respectively, at 20De (De is the nozzle exit diameter). It achieves a maximum jet velocity of 456 m/s. The optimal nozzle Mach number is 1.75, with a maximum jet velocity of 451 m/s. At 20De, the jet center velocity is 338 m/s, with a width of 0.12 m.
Publication Title
Transactions of Nonferrous Metals Society of China (English Edition)
Recommended Citation
CHEN, A.,
LIU, Y.,
WANG, Z.,
ZHAN, H.,
JIANG, X.,
SUN, F.,
Hwang, J.,
&
ZHANG, X.
(2025).
Turbulence numerical simulation of flow characteristics of Laval nozzle top blow jet.
Transactions of Nonferrous Metals Society of China (English Edition),
35(4), 1350-1361.
http://doi.org/10.1016/S1003-6326(24)66753-1
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p2/1628
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
© 2025 The Nonferrous Metals Society of China. Published by Elsevier Ltd & Science Press. Publisher’s version of record: https://doi.org/10.1016/S1003-6326(24)66753-1