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LI Jun
School of Energy & Power Engineering,
Xi'an Jiaotong University,
Xi'an 710049, China
LIU Lijun
Research Institute for Applied Mechanics,
Kyushu University,
Fukuoka 816-8580, Japan
FENG Zhenping
School of Energy & Power Engineering,
Xi'an Jiaotong University,
Xi'an 710049, China |
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NUMERICAL
VALIDATION OF
COMPUTATIONAL MODEL FOR
SHEET CAVITATING FLOWS*
Abstract:
A computational modeling for the sheet cavitating flows is presented. The cavitation model is implemented in a viscous Navier-Stokes solver. The cavity interface and shape are determined using an iterative procedure matching the cavity surface to a constant pressure boundary. The pressure dis-tribution, as well as its gradient on the wall, is taken into account in updating the cavity shape iteratively. Numerical computations are performed for the sheet cavitating flows at a range of cavitation numbers across the hemispheric headform/cylinder
body with different grid numbers. The influence of the
relaxation factor in the cavity shape updating scheme for the
algorithm accuracy and reliability is conducted through
comparison with other two cavity shape updating numerical
schemes. The results obtained are reasonable and the iterative procedure of cavity shape updating is quite stable, which demonstrate the superiority of the proposed cavitation model and algorithms.
Key words:
Sheet cavitation Liquid/vapor tracking method Numerical simulation |