EFFECT OF FUEL TYPE ON CONICAL FLAME INSTABILITY

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 954

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شناسه ملی سند علمی:

CCI04_006

تاریخ نمایه سازی: 29 دی 1392

چکیده مقاله:

In this paper, the behaviour of conical flame in respect to the coupled perturbation of velocity and equivalence ratio has been investigated. Linearized G-equation is utilized to define the flame dynamics. Burning velocity of a premixed mixture plays an important role in flame dynamics. Fluctuation ofburning velocity due to equivalence ratio oscillation is derived. For this purpose, an empirical model, which includes the properties of a premixed mixture, is utilized. Four governing dimensionless groups emerge inflame dynamics. Beside two well-known dimensionless groups, reduced frequency and the ratio ofburning velocity to the mean axial velocity , two others dimensionless groups emerge from the empirical model of burning velocity and the correlating coupled velocity and equivalence ratio. This analysisintroduces a new parameter, , to study the effects of operating conditions of flame which is a function ofintroduced dimensionless groups. The effects of fuel type, burner geometry, and equivalence ratio are studied.The comparison is made by propane/air and methanol/air indicates the propane/air has higher sensitivity to the perturbation. This Study shows the equivalence ratio can be significantly effective on the flame response

نویسندگان

Hojat Ghassemi

Assistant Professor, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

Saeedreza Zadsirjan

Graduate student of Aerospace Engineering, School of Mechanical engineering, Iran University of Science and Technology, Tehran, Iran

Morteza Amjadi

Bachelor student of Automotive Engineering, School of Automotive engineering, Iran University of Science and Technology, Tehran, Iran