可调复合增压柴油机高原功率恢复方案研究

为解决增压柴油机高原功率下降的问题，讨论了几种增压方式。在此基础上提出了可调复合增压方案（CASP）并开展了相应的仿真研究。以某V型八缸增压柴油机为原型建立了数值模型，在海拔3000m的条件下比较了两种高原策略与复合增压方案的效果。计算结果表明：采用复合增压方案可以明显地改善柴油机低速特性并抑制喘振倾向。标定功率恢复至平原的89.7%，最大扭矩值下降了3.7%，转速适应性系数提高为1.56，可调复合增压方案可以在高原环境下有效地恢复发动机功率。

Research on Composite Adjustable Supercharged Program of Diesel Engine for Power Recovery at Plateau

In order to overcome the deterioration of engine performance at plateau, several forms of supercharged programs were discussed. A new project called composite adjustable supercharged program(CASP) was proposed, and the relevant simulation was carried out. A V-type supercharged diesel engine with 8 cylinders was adopted to establish the numerical models. Two plateau strategies and CASP were compared. The results demonstrate that CASP is effective to enhance the performance of engine at low speed dramatically. The rated power of CASP at plateau can recover to 89.7% of the plain level, and the maximal torque is decreased by 3.7%, while the speed adaptive coefficient rises up to 1.56.  After all, CASP is an effective project to recover the power of diesel engine at plateau.