Structural Efficiency Analysis of a Piston for Aviation Engines

Abstract

The high-performance piston has a great impact on the performance parameters of the engine. The rapid design of a high-performance piston can shorten the research and development cycle and lower the experimental cost. At present, the piston design is mostly considered from a single factor, but it has not been comprehensively designed from multiple factors. Starting from the concept of structural efficiency, this paper defines the restrictive factors affecting engine performance parameters in piston design, puts forward an evaluation method of quantifying the benefit of piston design on engine performance parameters, and deduces the calculation model. The piston is designed and iterated many times to obtain the best two schemes. The two schemes are quantitatively compared through the above calculation model and verified by experiments. The results show that the structural efficiency of the piston in scheme 2 is 4.6% higher than that in scheme 1. The calculation method is applicable to the design of key engine components, which can shorten the research and development cycle, save the test costs, and greatly improve the R&D efficiency.