Abstract
The effects of rotational speed ratio on stability of two-stage contra-rotating compressors with the numeral method were studied. The effect law of rotational speed ratio on stall boundary and block boundary was analyzed. The stability of rotors in different rotational speed ratio was studied. The results show that: (1) when the rotational speed ratio R2:R1>1.0, the stall boundary and block boundary will deflect to low flow direction with increasing the rotational speed ratio. (2) When the rotational speed ratio R2:R1<1.0, the stall boundary will not change, but the block boundary will deflect to low flow direction with increasing the rotational speed ratio. (3) The variation of rotational speed of the first rotor has strong effect on the performance of the second rotor. But the speed variation of the second rotor has little effect on the performance of the first rotor. (4) The factors resulting in destabilization of contra-rotating compressor will differ with different rotational speed ratio.
| Original language | English |
|---|---|
| Pages (from-to) | 881-887 |
| Number of pages | 7 |
| Journal | Tuijin Jishu/Journal of Propulsion Technology |
| Volume | 33 |
| Issue number | 6 |
| State | Published - Dec 2012 |
Keywords
- Contra-rotating compressor
- Numerical simulation
- Rotational speed ratio
- Stability boundary