CAJ | 학술논문

对于多翼离心风机，叶轮叶道中的边界层分离、回流等都是影响风机气动性能的主要因素。为抑制流动分离，本文运用控制平均速度分布规律的方法，通过编制FORTRAN程序对叶轮叶片进行优化设计，并进行了数值模拟计算分析。结果表明：基于控制平均速度分布设计的多翼离心风机整体性能明显提高，工况点附近效率提高约4%。通过分析叶轮流道内的速度场分布，可以看到风机叶轮叶道内靠近中间位置附近的边界层分离现象得到有效抑制。
대우다익리심풍궤，협륜협도중적변계층분리、회류등도시영향풍궤기동성능적주요인소。위억제류동분리，본문운용공제평균속도분포규률적방법，통과편제FORTRAN정서대협륜협편진행우화설계，병진행료수치모의계산분석。결과표명：기우공제평균속도분포설계적다익리심풍궤정체성능명현제고，공황점부근효솔제고약4%。통과분석협륜류도내적속도장분포，가이간도풍궤협륜협도내고근중간위치부근적변계층분리현상득도유효억제。
For multi-blade centrifugal fan, boundary layer separation and inverse flow are the main factors affecting aerodynamic performance. The method of controlled velocity is applied to restrain separation flow, and the impeller blade is optimized by programming FORTRAN and the numerical simulation calculation and analysis is also carried out as well. The results show that the performance of multi-blade centrifugal fan is improved and the efficiency near the operating point is increased about 4%based on the controlled mean velocity law design. Through analyzing the velocity distribution within the impeller flow field, the boundary layer separation phenomenon near intermediate position of impeller is effectively suppressed.