Abstract
In view of the problem of too high thermal load in the bridge zone of cylinder head in highly intensified diesel engine, the effects of spray jet on the thermal load of cylinder head are studied. A scheme is proposed to control convective heat transfer from hot side and lower the thermal load of cylinder head by changing spray jet through the adjustments of angle between the axes of nozzle holes, the axial position of nozzle and spray cone angle. The results of 3D simulations on the in-cylinder combustion and heat transfer of a highly intensified diesel engine shows that, about 155° will be the best angle between the axes of nozzle holes, which is favorable for combustion but doesn't markedly increase the thermal load of cylinder head. Reducing the protruding distance of nozzle hole outlet will help improve combustion efficiency but may raise the thermal load of cylinder head concurrently. And the increase of spray cone angle will have adverse effect on thermal load of cylinder head.
| Original language | English |
|---|---|
| Pages (from-to) | 97-100+111 |
| Journal | Qiche Gongcheng/Automotive Engineering |
| Volume | 33 |
| Issue number | 2 |
| Publication status | Published - Feb 2011 |
Keywords
- Convective heat transfer
- Cylinder head
- Diesel engine
- Spray jet
- Thermal load