摘要
采用商业软件NUMECA对某型轴流压气机进行了数值计算,采用Spalart-Allamaras湍流模型,运用了多重网格技术以及残差光顺方法缩短计算周期。在额定工况计算的基础上进行了变工况的数值模拟,计算结果与试验曲线进行了对比分析,试验曲线与软件计算的曲线在趋势上是相符的。相同压比下,软件计算的流量偏大,在靠近额定工况点附近,流量偏差3%以内,在远离额定工况点流量偏差5%左右;对于喘振边界点的预测,运用NUMECA进一步提高出口静压可以逼近发散点,此时可以近似认为失速点,再结合NREC计算出的失速点,可以得到相应的喘振边界点。
A multi - stage axial - flow compressor with new blades was simulated with commercial software NUMECA. The Spalart- allamaras was adopted as the turbulence model, the multi -grid technique and the smooth residual method were used for reducing the time of the calculation. The off - design perform- ance was computed on the base of the rated condition point. The calculation results and the experimental values were compared and analyzed. The experimental curve and the calculated curve were consistence in the trend. The flow mass of the calculation was more than the experimental with the same comperession ra- tio. Near the rated operating point, the flow deviation was below 3 %, far away from the rated operating point,the flow deviation was about 5% ;For predicting surge margin,using NUMECA to further improve the outlet static pressure can approximate the point of divergence, which can be regarded as the stall, com- bined with the calculation by the software NREC, can ~et corresoondin~ surge mar^in.
出处
《节能技术》
CAS
2013年第4期353-355,366,共4页
Energy Conservation Technology
基金
基础科研(MPRD-GT0504)
关键词
轴流压气机
变工况性能
NUMECA
数值模拟
axial - flow
compressor
off - design performance
NUMECA
numerical simulation
