شبيه سازي موتورهاي اشتعال جرقه اي با تركيب سوخت گاز طبيعي و هيدروژن

Simulation of spark ignition engines combining natural gas and hydrogen gas

در اين مقاله سعي شده است تا با استفاده از روابط حاكم بر سيكل بسته موتور و معادلات قانون اول ترموديناميك و بقاء جرم، شاخص هاي مهم عملكرد و آلايندگي يك موتور گازسوز سوز شش سيلندر تا حد امكان پيش بيني گردد. اين شبيه سازي شامل محاسبات كامل سيكل بسته با استفاده از پارامترهاي هندسي، زمان بندي سوپاپها و زمان جرقه زني مي باشد سپس معادله قانون اول ترموديناميك براي هر يك از اين حجم هاي كنترلي حل و ارضاء مي گردد شبيه سازي به روش شبه ابعادي انجام شده و 53 گونه شيميايي در محصولات احتراق به كار گرفته است .با فرض دو ناحيه سوخته و نسوخته ، تعادل شيميايي براي تمامي گونه هاي شيميايي اعمال شده است ونتايج اين كد بعنوان يك ابزار مناسب قابليت پيش بيني ميزان آلايندگي ، توان و مشخصه هاي عملكردي يك موتور اشتعال جرقه اي نظير اندازه دما و فشار داخلي موتور و ميزان انتقال و آزادسازي حرارت بر حسب زاويه ميل لنگ را دارا مي باشد.

Today, due to the vast reserves of natural gas in the country, as well as the global approach to decline Environmental pollutants, the expansion of the use of natural gas as a clean fuel is on the agenda of the government. The blending of natural gas with other fuels is one of the world's top plans. One of these mixtures is the combination of hydrogen and methane. In this paper, it has been tried to predict the important performance indicators of a six-cylinder gas-fueled engine as predicted by the relationship between the engine-closed cycle and the equations of the first law of thermodynamics and mass survival. This simulation involves the complete calculation of the closed cycle using geometric parameters, valve timing and ignition time. Then, the equation of the first law of thermodynamics is solved for each of these control volumes. Simulation is carried out using a quasi-dimensional method. 53 chemical species have been used in combustion products. By assuming two burned and unburnt areas, the chemical equilibrium has been applied to all chemical species. The results of this code can be used as a suitable tool for predicting the amount of pollution, power and performance characteristics of a spark ignition engine, such as the temperature and internal pressure of the engine and the amount Transmission and release of heat in accordance with the angle of the crankshaft.