Abstract
The present paper describes experimental and numerical works to investigate noise phenomenon in supersonic flow that is discharged from a convergent-divergent nozzle. The noise phenomenon of flow is generated by an emission of 'transonic tones'. The results of obtaining show that the frequency of a transonic tone that differs from the frequency of a screech tone due to the shock-cell structures in a jet, and originates in the shock wave in the nozzle increases in proportion to the nozzle pressure ratio. The transonic tone of high-order has the directivity in the direction of the flow. As for the frequency of the transonic tone, the separated zone was calculated by using a simple flow model by whom the propagate perturbation was considered. The calculation results by the model were corresponding to the present experimental results well.
| Original language | English |
|---|---|
| Pages (from-to) | 2352-2357 |
| Number of pages | 6 |
| Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |
| Volume | 74 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2008 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering