Abstract
In a two-stroke-cycle engine, the scavenging flow plays a very important role in the combustion performance. In this type of engine, the loop-flow scavenging system is superior with regard to maintenance because the engine with this scavenging system has no exhaust valve and so has a simple structure. On the other hand, in this engine, the distance between a scavenging port and an exhaust port is shorter and the short pass flow of fresh air to the exhaust port occurs frequently, hence, the scavenging efficiency is generally inferior to that of a uniflow scavenging type of engine. Many experimental and numerical analyses of the scavenging characteristics of loop-flow type two-stroke-cycle engines have been conducted, but the authors believe that the development of a simulation technique for scavenging flow of this type of engine has not yet been completed. The authors have developed a numerical method for this type of engine. In this report, we present an examination of our numerical method comparing our findings with experimental results.
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