| 1. | The effects of blow ratio and rows on film cooling effectiveness and heat transfer coefficient was studied
研究了吹风比、孔排等因素对气膜冷却效果和换热系数的影响。 |
| 2. | The experimental results showed that the film cooling effectiveness were mainly determined by blowing ratios
该实验结果对涡轮叶片型面气膜冷却的实际工程设计研究有重要意义。 |
| 3. | The mass flow rate coefficients increase and achieve a constant at last with increasing blowing ratio . the influence of blowing ratio on the heat transfer coefficients and film effectiveness is complex
流量系数随吹风比的增大而增大并最终趋于某个定值，但吹风比对气膜孔下游换热系数和冷却效率则较为复杂。 |
| 4. | At the same blow ratios , the double - layer porous plate exhibits higher cooling effectiveness than single - layer , but the difference of cooling effectiveness between the triple - layer plate and the double - layer plate is not significant
在相同吹风比下，双层层板要比单层层板冷却有效性高，而三层层板与双层层板之间的差别不大。 |
| 5. | The results showed that the discharge coefficient of film cooling hole was greatly increased with the increase of blow ratio when the blow ratio m is lower , buta it had a little increase with the increase of m when m is larger
实验结果表明，在吹风比较小时，随吹风比的增加流量系数大幅度增加，当吹风比较大时，随吹风比的增加流量系数增幅减小。 |
| 6. | Results show that the influence of mainstream reynolds numbers on heat transfer coefficience is little and the heat transfer coefficience raise with the increase of reynolds numbers . the influence of the position of holes on heat transfer coefficience is complex and correlate with the mainstream speed and the balde surface curvature . and the influence of blowing ratio on heat transfer coefficience is more great ( especially to stator ) , and show a complex relation to mainstream reynolds number and the position of holes
实验结果表明，不同孔位出流的换热由于孔排下游表面来流速度及叶片表面曲率的不同而有不同的规律，而主流雷诺数对叶片表面特别是压力面和前缘区域的换热系数比的影响较小，吹风比对换热系数影响较大(特别是导叶) ，并且随气膜孔位置和来流雷诺数的变化而情况复杂。 |
| 7. | Firstly , for jet array impingement cooling , the effects of the distance of adjacent holes , the impinging distance and jet reynolds number on heat transfer characteristic at the target wall are summarized under staggered holes arrangement and the same hole diameter . and then , the numerical simulation of inclined multi - hole film cooling has been studied . the influence factors examined in this case include blowing ratio and the distance of adjacent holes
首先通过对射流冲击冷却方式的研究,分析了相邻孔间距、冲击间距以及射流入口雷诺数对冲击靶面换热系数的影响情况,然后对多斜孔冷却方式进行了数值模拟,重点探讨了吹风比和相邻孔间距对绝热温比与壁面换热系数的影响规律,最后,针对冲击-发散复合冷却流场的计算物理模型,研究吹风比、相邻孔间距的变化对冲击-发散复合冷却流动与传热特性的影响。 |
| 8. | The results show that : blow ratio is a main influential factor to the film cooling effectiveness , the film cooling effectiveness decreases with the increasing of blow ratio ; the film cooling effectiveness of discrete holes fluctuate dramatically across the transverse section , and dead zone is prone to occur be tween two discrete holes
结果表明：吹风比对气膜冷却效果的影响很大，冷却效果随吹风比的增大而降低；圆孔气膜冷却效果沿横向位置波动较大，孔之间容易形成冷却死区。 |
| 9. | The distribution of the mass flow rate , the heat transfer coefficients and the film effectiveness of cylindrical holes was measured . the influence of mainstream reynolds number , blowing ratio and the position of holes on flow rate , the heat transfer coefficients and the film effectiveness was studied greatly
测量了气膜孔的流量系数、气膜孔下游换热系数和冷却效率的分布，重点研究了主流雷诺数、二次流吹风比以及孔排位置对气膜孔的流量系数、气膜孔下游的换热系数和冷却效率的影响。 |
| 10. | ( 2 ) on the leading edge , the film cooling effectiveness at the zone immediately downstream of the cooling holes is affected by blowing ratio and mainstream reynolds number , while the effects are not important in the downstream zone far from the cooling holes . ( 3 ) on the front half of pressure surface , the effectiveness increases with decreasing blowing ratio at the downstream near the cooling row and it is contrary at the downstream far from the cooling row . ( 4 ) on the rear pare of the pressure surface , the effectiveness decreases with increasing blowing ratio and does not vary so much downstream in the cases of higher blowing ratio
研究结果表明叶片吸力面端壁附近区域压力系数分布呈现出较强的三维特性，动叶吸力面尤其明显；气膜孔流量系数随吹风比的增加而增大，在高吹风比情况下，流量系数逐渐趋于常数；在不同型面区域，冷却效率分布有较大的差异，而且吹风比与主流雷诺数的影响程度也不尽相同；低吹风比下，孔出口下游附近可以得到较好的冷却，中、高吹风比下，冷气射流在加速流动主流的作用下返回壁面进行二次冷却，孔下游较远区域可以得到较好的冷气覆盖。 |
