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Edition and Publication:
< Natural Gas and Oil > Editorial Department
Hosted by:
China Petroleum Engineering & Construction Corporation Southwest Company
Authorized by:
China Petroleum Engineering & Construction Corporation
Co-hosted by:
Overseas Research Center of Research Institute of Petroleum Exploration and Development
Editor in Chief:
Du Tonglin
Vice Editor in Chief:
Tang Xiaoyong,Pu Liming
Address:
No.6, Shenghua Road, High-tech District, Chengdu, Sichuan, China
Postal Code:
610041
Tel:
028-86014709
028-86014500
Email:
cnpc-ngo@cnpc.com.cn
Issue:ISSN 1006-5539
CN 51-1183/TE

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Abstract： In order to improve the tank derusting efficiency and expand the application of cavitation water jet technology, a new type of a central-body cavitation nozzle is designed, which is formed by cone nozzle and central body. The design of the central-body cavitation nozzle is studied. The internal and external flow fields of the nozzle with different structure parameters are numerically simulated by using Mixture multiphase flow control equation, Realizable

turbulence model and Schnerr-Sauer cavitation model with Fluent software. The flow field pressure distribution, the axial velocity distribution and the gas holdup are compared and analyzed. The results show that the rationality and feasibility of the model and control equation are proved by the simulation. The designed nozzle jet flow field can effectively generate cavitation. The cavitation region mainly exists near the end of the central-body. The gap distance between the central-body and the outer nozzle and the length of the outer nozzle cylindrical section are the direct factors of influencing the cavitation forming effect. The reasonable combination of nozzle structure parameters can improve the cavitation capacity, thereby improving the quality of cleaning rust.