An Experimental Analysis of the Knock Response of Different Stoichiometric Mixtures of Gasoline-Natural Gas to Various Engine ‎Speeds

محورهای موضوعی : مجله بین المللی ریاضیات صنعتی

R. Behrad ¹ , E. Abdi Aghdam ² , Hadi Ghaebi ³

1 - Faculty of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
2 - Faculty of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.
3 - Faculty of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.

تاریخ دریافت : 1398/07/29 تاریخ پذیرش : 1398/09/23 تاریخ انتشار : 1401/10/11

کلید واژه: Natural gas, knock, dual fuel, Gasoline, spark ignition engine,

چکیده مقاله :

Gasoline causes engine knock in higher compression ratios due to having lower spontaneous ignition temperature. Natural Gas (NG) has a higher octane number and is a proper fuel in terms of anti-knock properties; however, using it as the engine fuel results in a decline in the power of the engine and increases the emission of some exhaust gases due to lower burning velocity and gaseous nature.

چکیده انگلیسی:

بنزین به دلیل داشتن دمای اشتعال خود­به­خودی پایین­تر باعث کوبش موتور در نسبت تراکم بالاتر می­شود. گاز طبیعی (NG) عدد اکتان بالاتری دارد و از نظر خواص ضدکوبشی سوخت مناسبی است. با این حال، استفاده از آن به عنوان سوخت موتور منجر به افزایش انتشار برخی از گازهای آلاینده­ی خروجی و کاهش قدرت موتور می شود که دلیل آن کاهش سرعت سوختن و طبیعت گازی سوخت است. استفاده از مخلوط بنزین و NG با سوخت غالب بنزین می­تواند کاهش قدرت موتور را جبران کرده و از وقوع کوبش موتور جلوگیری کند. با در نظر گرفتن این موضوع، در مطالعه حاضر، 4 ترکیب مختلف بنزین و NG شامل 100%، 90%، 80% و 70% بنزین و مابقی NG (به ترتیب GA100، GA90، GA80 و GA70) با استفاده از یک موتور تحقیقاتی SI تک سیلندر با نسبت هم­ارزی 1.0، نسبت تراکم 11، و سرعت موتور 1500، 1800 و 2100 دور در دقیقه به صورت تجربی مورد بررسی قرار گرفت.

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