Comparison investigation of axial flow compressors with and without shrouded stators
LI Xiang, GU Chunwei
Key Laboratory for Thermal Science and Power Engineering of the Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China
Abstract：The stator design was changed from shrouded to unshrouded for the Tsinghua 1.5-stage transonic axial flow compressor test rig to study whether the unshrouded stator met the design requirements. Both shrouded and unshrouded configurations were simulated using CFD, with the influence of the stator gap size also investigated. The results show that the efficiency is 1.8% higher at the design point and the stall margin increases by 1.5% for the compressor with the unshrouded stator. The leakage flow and endwall secondary flow are balanced at a smaller gap, but the clearance flow tends to be dominant near the endwall at a larger gap, e.g. 0.8 mm. Therefore, the gap size should strictly be controlled in the manufacturing process.
李想, 顾春伟. 轴流压气机带冠静叶和不带冠静叶的比较研究[J]. 清华大学学报（自然科学版）, 2015, 55(12): 1361-1366.
LI Xiang, GU Chunwei. Comparison investigation of axial flow compressors with and without shrouded stators. Journal of Tsinghua University(Science and Technology), 2015, 55(12): 1361-1366.
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2015, Vol. 55 
