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Title: Analysis of unsteady gas flow in a plain pipe exhaust system of a firing engine and its side effect upon the performance of a naturally aspirated two-stroke oil engine
Author: Wright, Edmund Harvey
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 1961
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The present investigation is part of a long term research programme dealing with the wave action in the exhaust and induction pipes of a two-stroke oil engine and their effect upon the cylinder scavenge process. As a development of fundamental researches carried out at the University Laboratories using simulated cylinder release pressures in a motored engine, the present investigation seeks to extend the established data to the practical problem of the engine under firing conditions. In this report, the theoretical analysis of unsteady one-dimensional gas flow, all owing for the effects of wall friction, heat exchange with the surroundings, and temperature discontinuities is developed, and the Method of Characteristics is applied to effect a solution. Theoretical exhaust pipe and cylinder indicator diagrams are evaluated using this theory, and compared with the experimental diagrams from the firing engine. From performance trials, the measured air consumption using a constant air/fuel ratio, but different exhaust pipe lengths and engine speeds, is evaluated and plotted on a dimensionless basis for comparison with the previous simulated work.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TJ Mechanical engineering and machinery