The objectives of this study are to propose exact numerical methods for the compressible cryogenic cavitating flows and investigate the cavitation behaviors and vortex structures. A numerical modeling framework including large eddy simulations, vapor–liquid equations of state, and a modified mass transport model is presented in this paper. The modified transport model is proposed based on the convective heat transfer in which the convective heat transfer coefficient is associated with the material properties and local temperature. To validate the applicability of the modified model, the liquid nitrogen cavitating flows in the inertial and thermal modes (σ ≈ 0.50, Tthroat = 77.24 K and Tthroat = 85.23 K) are simulated, respectively. Meanwhile, the influence of thermodynamic effects on compressibility is investigated. The numerical method is further utilized to visualize the detailed cavity and vortex structures in different cavitating flow patterns (Tthroat ≈ 77 K, σ = 0.58, 0.39, 0.18). The results show that the predicted cavity structures with the modified mass transport model agree better with the corresponding experimental data. For the thermal mode, since the significant thermal effects restrain the development of cavity, the area of the low sound speed region is smaller than that of the inertial model. The value of the minimum sound speed is larger, so that the Mach number in the cavitation region is reduced. Therefore, the compressibility of the liquid nitrogen cavitation in the thermal mode is weaker. For different cavitating flow patterns, the core region of attached cavities near the throat remains stable during an evolutionary cycle. Compared to the attached cavity region, since some hairpin vortices break into many small-scale discrete vortices, the multi-scale effect of vortex distribution is more remarkable in the shedding cavity region.
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April 2023
Research Article|
April 03 2023
Numerical investigation of compressible cryogenic cavitating flows by a modified mass transport model
Special Collection:
Cavitation
Chen Jiacheng (陈家成)
;
Chen Jiacheng (陈家成)
(Data curation, Formal analysis, Investigation, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
1
School of Mechanical Engineering, Beijing Institute of Technology
, Beijing 100081, China
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Liang Wendong (梁文栋)
;
Liang Wendong (梁文栋)
(Formal analysis, Investigation)
1
School of Mechanical Engineering, Beijing Institute of Technology
, Beijing 100081, China
2
Beijing Aerospace Propulsion Institute
, Beijing 100076, China
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Han Lei (韩磊)
;
Han Lei (韩磊)
(Data curation, Formal analysis)
1
School of Mechanical Engineering, Beijing Institute of Technology
, Beijing 100081, China
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He Yanfei (何燕飞)
;
He Yanfei (何燕飞)
(Formal analysis, Validation)
1
School of Mechanical Engineering, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Institute of Technology Chongqing Innovation Center
, Chongqing 401120, China
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Chen Tairan (陈泰然)
Chen Tairan (陈泰然)
a)
(Formal analysis, Investigation, Methodology, Project administration)
1
School of Mechanical Engineering, Beijing Institute of Technology
, Beijing 100081, China
3
Beijing Institute of Technology Chongqing Innovation Center
, Chongqing 401120, China
a)Author to whom correspondence should be addressed: chentairan@bit.edu.cn
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a)Author to whom correspondence should be addressed: chentairan@bit.edu.cn
Note: This paper is part of the special topic, Cavitation.
Physics of Fluids 35, 043304 (2023)
Article history
Received:
January 12 2023
Accepted:
March 10 2023
Citation
Jiacheng Chen, Wendong Liang, Lei Han, Yanfei He, Tairan Chen; Numerical investigation of compressible cryogenic cavitating flows by a modified mass transport model. Physics of Fluids 1 April 2023; 35 (4): 043304. https://doi.org/10.1063/5.0142186
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