| 1. | Brake specific fuel consumption
制动器马力小时比油耗 |
| 2. | Isfc indicated specific fuel consumption
指示比油耗 |
| 3. | Bsfc brake specific fuel consumption
制动油耗率 |
| 4. | Specific fuel consumption
比燃料消耗率 |
| 5. | Thisformula can be used to evaluate the relative changes of engine specific fuel consumption caused by the relative changes of engine moving parts mass during engine design and practical operation
在发动机设计阶段和发动机实际使用中，可以应用这个公式，估计运动件质量变化所引起的比油耗的相对变化。 |
| 6. | Tip clearance has much effect on the properties of aero - engine . as the reference of the project design , the numerical computation of tip clearance can improve the aero - engine performance , reliability and to reduce the specific fuel consumption ( sfc )
叶尖间隙对航空发动机性能有较大的影响,研究叶尖间隙的数值分析技术可以为工程设计提供参考,从而提高航空发动机的工作性能、可靠性和耐久性。 |
| 7. | Improvements in performance include reductions in specific fuel consumption ( 4 % ) , take - off distance ( 10 - 20 % ) , minimum speed ( 100 kias ) , time to climb and increase in specific excess power , sustained load factor and sustained turn rate ( 15 % )
性能改进方面包括减少4 %的耗油率，缩短10到20 %的起飞距离，减少最低速度大约一百指示空速节，缩短爬升时间和增加单位剩余功率，提升15 %的持续回转率与持续负载系数。 |
| 8. | Simulation results presented here demonstrate that during accelerating flight at constant altitude thrust increases up to approximately 12 percent in the maximum thrust mode , and at subsonic cruise specific fuel consumption decreases up to 2 percent in the minimum fuel consumption mode
试验结果表明两种优化模式下，飞推综合控制的优化算法可以显著提高发动机性能，也验证了该优化计算机设计方案是可行的。 |
| 9. | A new calculation method for optimizing diesel engine performance , called nonlinear regression - mess method , is put forward . in this paper , 25 groups of simulated values are calculated from the diesel engine working model , specific fuel consumption , peak pressure , rate of pressure rise , nox and peak temperature are fitted into explicit function about compression ratio and fuel injection advance angle
本文利用柴油机工作过程模型，得出25组模拟计算数据，利用非线性回归将油耗、最大爆发压力、压力升高率、 no _ x浓度及最高燃烧温度拟合成压缩比和喷油提前角的显函数，并用网格法进行优化，用c语言编制了优化计算程序，得出最佳的压缩比和喷油提前角，使其优化匹配。 |
| 10. | ( 3 ) according to the optimization calculated results , the structural parameters of zs1125 direct injection diesel engine are changed , and the experiments are carried out . the comparison of the diesel engine performance before and after optimization shows that the diesel engine ' s specific fuel consumption , exhaust temperature and smoke decreased , which reached research goal
( 3 )按照优化计算结果，对zs1125型直喷式柴油机的结构参数进行了改进，并进行了试验验证，结果表明，优化后柴油机的油耗、排气温度和烟度比优化前有所降低，达到了本文研究的目的。 |
