Flow and Structural Improvement Design of LNG Ship Butterfly Valves based on Fluid-Heat-Solid Unidirectional Coupling Calculation
Taking the ultra-low temperature butterfly valves as the research object and liquefied natural gas(LNG)as the fluid working medium,the parameterization processing of structure size of butterfly plate was carried out by using Solidworks software.Based on computational fluid dynamics numerical sim-ulation technology,the fluid-heat-solid unidirectional coupling calculation analysis of butterfly valves was performed by using Ansys software,the flow coefficient of the butterfly plate under different butterfly valve opening of 90°-10° was calculated,and the effects of different butterfly plate structure parame-ters on the butterfly valve circulation performance,the butterfly plate displacement and stress behavior under butterfly valve opening of 10° were analyzed.The calculation results show that reducing the butter-fly plate thickness can significantly enhance the flow performance of the butterfly valve,and reduce the maximum stress on the butterfly plate;decreasing the journal thickness has a weaker effect on improving the flow performance of butterfly valves,but it can effectively reduce the maximum stress on the butterfly plate.
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