Numerical simulation of non-uniform flow field structure behind classic flat baffle

作者：Sun Peng^*; Gao Hai Yang; Zhong Jing Jun; Du Kun

来源：Journal of Propulsion Technology, 2013, 34(2): 173-180.

• Distortion degree
• Flat baffle
• Flow field structure
• Non-uniform flow fields
• Numerical simulation research
• Parallel computing techniques
• Total pressure distortion
• Unsteady numerical simulations

As the rapid development of computation speed, computer memory capacity and parallel computing technique, 3D unsteady numerical simulation method has already been used to solve the compressor flow field under the condition of non-uniform inlet. Although, considering element number and computing period, the cross section ahead of compressor rotor not far away is usually taken as inlet to simplify the inlet distortion form. However, the difference between such simplification and actual non-uniform characteristic of compressor inlet decreases the accuracy of numerical simulation. In order to realize inlet distortion status actually and meanwhile not to increase grid number of the computed domain, the numerical simulation research was carried out aiming at non-uniform flow field structure produced by classical flat baffle distortion generator. Then flow field structure and distortion degree of different positions behind the flat baffle were analyzed and the change regulation of total pressure distribution before compressor as changing of flat baffle depth and inlet total pressure was discovered, and then the description of total pressure distribution form ahead of compressor rotor was given out.

• 出版日期2013