تحديد القيم المميزة المثلى لهواء إقلاع المحركات البحرية

The starting of marine and large diesel engines is carried out by compressed air with pressures between 0.5 and 3.2 MPa. This paper aims to calculate the main air parameters of marine diesel engines' air starting, using the computer. It also studies the effect of air pressure and the minimum angular velocity () of the engine on the necessary starting time and the necessary work for the air compressor. Special focus has been placed on the assessment of economy and efficiency of the whole starting process. At the end of the study, the results of computer calculation have been presented. They have illustrated that there is a certain value of air pressure, whereby the necessary compression work is minimal and that for every () there is an optimal efficiency for starting process.