casing configuration meaning in English

壳体的几何形状

Experimental research of an axial flow compressor performance with stepped tip gap casing configuration
梯状尖部间隙机匣处理对轴流压气机性能影响的实验研究
Only axisymmetric layout of tip gap can improve mass flow range , namely , all asymmetric casing configurations can not improve compressor performance and stability
由实验分析得知，只有在转子尖部间隙为轴对称时，才有可能改善转子的性能；非轴对称形式，即尖部间隙周向的变化，只能恶化转子的性能。
Twelve casing configurations were investigated , consisting of three step profiles at each of three clearance levels ( including seven casing geometric size ) to find the effects of radial / axial variation of tip gap on rotor performance , and five casing configurations including two types of asymmetric profiles were applied in the research of circumferential variation of tip clearance
文中设计了十二种机匣结构用于与实壁机匣相比较，包括轴向布局的七种阶梯状结构及五种周向变化的不对称结构形式(偏心周向变化和椭形周向变化) 。