燃机排气装置扩压器的设计和试验研究

本文对燃机排气装置扩压器进行了试验研究。针对一个正在使用中的排气装置,测定其原型的性能,而后在原型外壳尺寸一定的条件下,采用本文所推荐的两种形式的燃机轴径式扩压器型面设计方法,一种为等角扩压器,一种为带中间收敛的扩压器,并进行了试验验证。试验结果表明,采用所提出的方法设计的扩压器性能较好,能显著改善排气装置的性能。但由于受到原扩压器外壳尺寸的限制,上述两种扩压器设计方法的优越性未能得到充分发挥,文中只能作相对比较。本文所推荐的燃机排气扩压器的设计方法对工程应用具有实际参考价值。

Design and Experimental Study of the Diffuser for the Exhaust Duct of a Gas Turbine Engine

The diffuscr for the exhaust duct of the gas turbine engine has been investigated experimentally. The paper presents two development design methods to modify a diffuser shape of the same outside dimensions under use.The experimental results show that the performance of the exhaust duct can be significantly improved by using the developed design methods. But by confining to the outside dimensions of the original diffuser, the advantages of the two design methods cannot be brought into full play. The design methods developed for the exhaust diffuser may be applied to the practical engineering.