Air Admission Feature and Discharge Coefficient of Fixed Conical Valve

Authors

Chengbiao Tong, 1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;;2. College of Engineering, Hunan Agricultural University, Changsha 410128, China;;
Zhixiong Zhou, 1. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China;;
Qiuxia Yan, 3. Investigation and Design Institute of Water Resources and Hydropower Liaoning Province, Shenyang 110006, China;

Abstract

Abstract: The complicated flow pattern is existent in fixed conical valve. When the high speed jet flowing near the diversion cone injects the sudden enlargement area, the severe vortex and evident negative pressure are generated. To reduce or eliminate the negative pressure area, the admission pipe should be installed. For clarifying the air admission and flow rule beyond air admission, a calculation mathematical model is built, the basic law of negative pressure generation and air admission is obtained; CFD is adopted to certify that the admission pipe is efficient to restrain the negative pressure; under air admission condition, the two-phase flow analysis for fixed conical valve are done, so the discharge coefficient and air injection law are gotten. The conclusion is verified by experiment. The study testified that combining the CFD with theoretical model to solve the air admission and discharge coefficient for fixed conical valve is feasible.

Recommended Citation

Tong, Chengbiao; Zhou, Zhixiong; and Yan, Qiuxia (2019) "Air Admission Feature and Discharge Coefficient of Fixed Conical Valve," Journal of System Simulation: Vol. 30: Iss. 8, Article 45.
DOI: 10.16182/j.issn1004731x.joss.201808045
Available at: https://dc-china-simulation.researchcommons.org/journal/vol30/iss8/45

First Page

3188

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201808045

Last Page

3197

CLC

TG156

Recommended Citation

Tong Chengbiao, Zhou Zhixiong, Yan Qiuxia. Air Admission Feature and Discharge Coefficient of Fixed Conical Valve[J]. Journal of System Simulation, 2018, 30(8): 3188-3197.

DOI

10.16182/j.issn1004731x.joss.201808045