The blast loss influencing factors research of reversing turbine blades
In order to explore the factors influencing blast loss of reversing turbine blades under reverse conditions,the double-layer turbine blades in a reversing gas turbine were taken as the research object in this study Under the forward working condition,the generation mechanism of blast loss of reversing gas turbine blades in a reverse rotating state was analyzed by using the finite element simulation calculation method.And the reverse blast loss was calculated under different rotating speeds,different air pressure,different air temperature,different blade heights,and different baffle parameters.The influencing factors of blast loss was obtained,and the relational expression between key parameters and blast loss were refined.The calculation results show that the blowing loss generated by reverse rotation of reversing turbine blades increases with the increase of rotating speed,air pressure,blade height,respectively,and decreases with the increase of air temperature.After adding baffles near the blades,the blowing loss is reduced significantly.What's more,the blowing loss decreases with the increase of the distance between the blade and the baffle.With the increase of the gap between the baffle and the internal flow wall panel,the blast loss first decreases and then increases.The conclusion can be used to guide the design of reverse turbine blast loss control device.