CFD-based flow field analysis around holes on spiral grooved dry gas face seal

In order to determine the factor of influence of the holes,which were opened on the end face of static seal-ring for installing the transducer,on the gas-film pressure of the flow field,the software Solid works was used to build up a gas-film model of three-dimensional spiral grooved gas face seals,including two models: one being with holes on the end-face of the static seal-ring at the position of root-radius of the moving seal-ring and the other being without holes.In a specified operational condition,the numeric simulation was carried out respectively for the three-dimensional gas flow field within the small gap of the spiral grooved gas face seals of the two models by using the software Fluent and then,the leakage of the seals was obtained for the two models,which was very close to that of experiment,manifesting that the software Fluent could be used to analyze the flow field in the mini-dimensional spiral groove and,in consequence,the magnitude of pressure derived for different model simulation would be accurate.The influencing factor of the holes for the transducer was computed out that would be of practical meaning for finding a real magnitude of the pressure specially measured or measure during the equipment monitoring.