|
| Aerodynamic Design and Performance Comparison of Supersonic Nozzle Using Airflow Sweeping |
| Received:March 27, 2023 Revised:May 09, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.08.012 |
| KeyWord:supersonic nozzle aerodynamic design large eddy simulation outflow field cleaning performance |
| Author | Institution |
| ZHAO Hong-xing |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| LU Yao-hui |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| WANG Bei-kun |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| TANG Bo |
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu , China |
| LUO Yin-sheng |
Tangshan Baichuan Intelligent Machine Co., Ltd., Hebei Tangshan , Chin |
| CHEN De-jun |
Tangshan Baichuan Intelligent Machine Co., Ltd., Hebei Tangshan , Chin |
| MAO Rong-sheng |
Tangshan Baichuan Intelligent Machine Co., Ltd., Hebei Tangshan , Chin |
|
| Hits: |
| Download times: |
| Abstract: |
| It is proposed to use a Laval nozzle to generate high-speed airflow to clean the water film attached to the solid surface. A central axisymmetric conical nozzle (Taper-A), a central axisymmetric Sivell nozzle (Sivell-A), a central axisymmetric minimum length nozzle (MLN-A), and a two-dimensional conical nozzle (Taper-2D) were designed. An LES numerical simulation model including the external flow field was established and simulated. The external flow field structure was analyzed and the cleaning performance of the supersonic nozzle was analyzed based on the Weber number criterion. MLN method could shorten the nozzle length by 50%. The external flow field velocity of supersonic airflow showed a fluctuating attenuation trend, and the airflow expansion of the characteristic line method nozzle was more sufficient. Shortening the nozzle length reduced the boundary layer thickness of the internal flow field, so MLN-A had less energy dissipation in velocity fluctuations. Excessive nozzle length could also reduce cleaning performance, with the maximum equivalent water film thickness of MLN-A and Taper-2D being less than 0.2 μm in areas with xL>2. The effective cleaning area of MLN-A was more than 15% higher than that of Taper-A nozzle, and the cleaning performance was optimal. The MLN method can shorten the nozzle length, the nozzle structure has great effect on cleaning performance and MLN-A nozzle has the best cleaning performance. |
| Close |
|
|
|