The Simulation And Experiment Research For Combined Device Of Internal Combustion Engine And Stirling Engine

With environmental problems such as energy crisis and climate warmingincreasing seriously, the fuel consumption of automobile engine becomes the hottopic people concerned. Recovering the exhaust energy effectively will be importantto improve the rate of fuel utilization. This paper applied Stirling engine as the bottomthermodynamic cycle device of internal combution engine, built internal combutionengine and Stirling combined cycle system and explored characteristics in differentsituations. In order to better explore the performance of combined dynamical cycle ofinternal combustion engine and Stirling engine, this paper divided the combined cycleinto three parts: internal combustion engine and exhaust system, exhaust system andStirling engine’s heater, and the Stirling engine. It mainly discussed the last two partsand conducted the simulation and experiment research. Specific content is as follows:1. According to the characters of Stirling engine, this paper set up amathematical simulation model of α type Stirling engine, and made a calculation witha designed construction data. Analyzed the performance of the Stirling engine indifferent conditions and the effects of different parameters on the Stirling engine’soutput.2. In order to make Stirling engine recover the exhaust heat effectively, anapplication of CFD software was used to make the a3D simulation for heat flow fieldaccording to the traits of Stirling engine’s heater. The model calculated the heatreleased from exhaust and the heat absorbed by working substance in heater underdifferent simulation conditions, which provided certain theoretical basis to theexperiments of combined cycle. Coupled the1D and3D simulation results, got thecombined cycle efficiency. Due to the poor heater thermal performance, the efficiencyjust increased by0.4%.3. Set up and tested the experiment system of ICE and Stirling combined cycle.Analyzed the existing problems and the shortages according to the experimentphenomenon of the combined cycle. In the end, the article put forward theimprovement plans about the Stirling engine’ heater, and made simulation andanalysis on the optimized heater, which provided an important reference to the wasteheat transformation and utilization in the combined cycle.