Heat Losses from the Turbine of a Turbocharged SI-Engine - Measurements and Simulation

摘要: Traditionally, heat losses from the turbine are neglected in turbomatching calculations as well engine simulations [1]. On SI-engine, with it's high exhaust temperatures, this assumption will lead to errors calculations. Significant amounts of dissipated through several mechanisms. This paper contains measurements different loss mechanisms during full load operation on a 4-cylinder SI-engine. The largest components convective and radiative. cooling water lubrication oil were approximately 3-5% total turbine. In addition surroundings, flux is also present internally turbocharger. Heat compressor can deteriorate efficiency compressor. Measurements performed for conditions it could be concluded that little possibility exists significant rotor, instead major comes conduction housings external radiation. With transfer included model outlet temperature simulated very close measured. However, incorporation simulation did not do much necessity using correction factors efficiency.