Turbulence Length Scale Measurements by Two-Probe-Volume LDA Technique in a Diesel Engine 902080

Cycle resolved LDA measurements of the tangential velocity component, made along a diameter of two combustion chambers (toroidal and square) during the compression stroke of a diesel engine operating at 600 and 1000 rpm, are discussed.Indirect measurements of lateral integral length scales determined by single point autocorrelation technique are presented.Finally direct measurements of lateral integral length scales made by a new laser doppler velocimeter system based on two probe volume technique are reported.


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