进气富氧比例对氨氢内燃机燃烧 及排放性能的影响

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中图分类号： TK46+3 文献标识码：A DOI：10.7535/hbkd.2025yx06011

Abstract：Inresponsetothe problems of slowcombustionspeed，dificult ignitionand high emissionsof ammonia-hydrogen fueliniternalcombustionengines，thecombustion spedandstabilityof theammonia-hydrogen mixturewere improved by increasingtheintakeoxygenconcentration.Thisaproachenhanced thepowerperformanceandthermaleficiencyof internal combustion engines while simultaneously reducing emisions.CONVERGE softwarewas usedto conduct combustion simulations on the ignition-type internal combustion engine model，maintaining the ammonia-hydrogen molarratio at 85% and 15% ， and gradually increasing the oxygen proportion from 21% to 29% . The results show that as the oxygen concentration increases，theindicated mean efectivepressureof theenginegraduallyrisesandpresentsalineartrend.Thecombustion stabilityofthe in-cylinder mixture improves，andthecombustiondurationshortens.Withthe increaseinoxygenconcentration， the peak temperature in the cylinder also rises，leading to an increase in nitrogen oxides （NOx ）emissions.The indicated thermal eficiencyoftheinternalcombustionengineexhibitsatrendofinitiallyincreasingandthengraduallydecreasingasthe oxygen concentration rises. The thermal efficiency of internal combustion engines peaks at 40.13% when the oxygen proportion （Ω）reaches 27% .The research provides a reference for the practical application ofammonia-fueled internal combustion engines.

Keywords：internal combustion engine engineering；spark ignition；ammonia；hydrogen；oxygen-enriched combustion

内燃机在环境适应性、使用寿命和成本方面都具有显著优势，在未来相当长的一段时间内仍将是交通运输业的主要动力源[1-3]。（剩余12955字）