Indian Journal of Science and Technology

Abstract

Objectives: This study attempted research to suggest the excellent result that increases the flame shapes, responses, energy of initial sparks and fuel efficiencies of plasma jet then the performance results using the conventional point spark at mixed condition (lambda 1.6) of a very rarefied air and gas including point of combustion limitation through the flame visualized chamber. Methods/Statistical Analysis: The experimental device was manufactured with the volume of the visualized chamber at 400cc to enable the observation of the flames of the conventional point spark and plasma jet. Moreover, the experiment was conducted under conditions including the most ideal excess air ratio (λ) of 1.0 and the lambda (λ), which is the extremely rarified mixture ratio, of 1.6 within the combustion chamber of the engine. Findings: As the result of the analysis of the expanding flame area, there was a further increase in the flame of the plasma jet over a very short period of time from 45ms to 50ms, with the display of the characteristic of expanding 30ms faster than the conventional point spark. Application/Improvements: From the experimental results, it was possible to arrive at the conclusion of the research that the combustion flame of the plasma jet has an improved combustion rate, flame characteristics and combustion characteristics in comparison to those of the conventional point spark since the plasma jet delivers powerful energy into the internal aspect of the visualized chamber even if it is mixed at a lean condition.

Keywords: Excess Air Ratio, Fuel Efficiency, Flame Shape, Lean-Burn, Plasma Jet