齿位置对压气机级间封严影响的数值研究

通过对压气机级间封严不同齿位置时的流场和温度场进行数值模拟,获得其泄漏特性、旋流特性和风阻温升特性.研究单齿、双齿和三齿的相对位置对级间篦齿封严的流量系数、出口旋转比和风阻温升的影响.结果表明:单齿情况下,单齿在下游时的流量系数最小,出口旋转比和风阻温升最大.双齿情况下,上游和下游各一齿时的流量系数最小.三齿情况下,上、下游和中间各一齿时流量系数最小.出口旋转比和风阻温升都随流量系数的减小而增大.

Numerical study on the influences of tooth position in compressor stator well sealing

Numerical simulations of the flow and temperature fields were carried out at different tooth positions in compressor stator well sealing. The sealing characteristics, swirl characteristics and windage heating characteristics of a labyrinth sealing with different tooth positions were studied. Influences of relative different positions of single, double and triple teeth on the discharge coefficient, outlet swirl ratio and windage heating were studied. The results show that the discharge coefficient is minimum, outlet swirl ratio and windage heating are maximum when the single tooth is placed at downstream position. Under the double teeth condition, when one is at upstream position and the other at downstream position, the discharge coefficient is minimum. Under the triple teeth condition, when upstream, downstream and middle positions are separately provided with a tooth, the discharge coefficient is minimum. With the decrease of discharge coefficient, the outlet swirl ratio and windage temperature increase.