Experimental Study of the Swirl Motion in Direct Injection Diesel Engines under Steady State Flow Conditions (by LDA) 860026

A detailed three-dimensional study of the mean flow and the turbulence inside the liner of a direct injection diesel engine under steady state flow conditions has been carried out by laser doppler anemometer measurements. The influence of the valve lift, the port orientation (using a cylinder head with variable direction of the inlet channel) and the mass flow on flow characteristics (kinetic energy distributions, momentum flux, swirl parameters) has been analysed.
These flow characteristics have been used to analyse the relation between the real flow pattern and swirl parameters as measured by the flow rectifier method and the paddle wheel anemometer.


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