Abstract
According to the one-dimensional theory of the ejector,the mixing efficiency of two air currents is critical to the performance of supersonic ejectors.In this paper,the method of improving airflow mixing efficiency by the petalage nozzle is proposed to improve the ejector performance.The numerical simulation of ejector is carried out by using FLUENT software.The influence of the performance of the ejector with a petalage nozzle is analyzed.The variation of the ejector performance under different operating parameters is calculated.The numerical results show that: Under the design conditions,the critical back pressure of the ejector with a petalage nozzle is increased by 5%,and the entrainment ratio is increased by 13.3%.Besides,the larger the high pressure or the lower the low pressure,the larger the entrainment ratio of the ejector with a petalage nozzle.The entrainment ratio of the new ejector is relatively increased by 13.5% under the critical condition,and the critical pressure is increased by 5%.
| Translated title of the contribution | Numerical Investigation of Ejector Performance with a Petalage Nozzle |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 23-30 |
| Number of pages | 8 |
| Journal | Reneng Dongli Gongcheng/Journal of Engineering for Thermal Energy and Power |
| Volume | 34 |
| Issue number | 2 |
| DOIs | |
| State | Published - 20 Feb 2019 |