An Experimental Study on Diesel Spray Behavior. Non-dimensional Expression for Spray Tip Penetration. : —Non-dimensional Expression for Spray Tip Penetration—

概要

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An experimental work has been carried out to explain the Diesel spray behavior. The measurement is per-formed for the spray tip penetration and the spray angle with three different injection pressures and ambient gas density. The change of ambient gas density has been done with pressured N2 gas and a high density SF6 gas. The density of SF6 gas is about 5.3 times N2 gas at room conditions. The obtained results for spray tip penetration are simplified with non-dimensional form. The form is based on Break-up length and time. As a result, the non-dimensional data with N2 gas fit to a curve that is unaffected with different injection pressure and ambient gas density. Moreovere, the measurement result (penetration and angle) with SF6 gas has been shown same result with N2 gas. Therefore, the potential of the non-dimensional expression method for the spray tip penetration is confirmed.