This paper presents an experimental method for determining the maximum power obtainable from an aircraft diesel engine derived from the automotive field. Several tests were performed to estimate the real values of pressure and thermal loads on the piston and head. The simple and original method described in this paper made it possible to define two constants for the description of the engine-performance-envelope. Maximum allowable pressure on the piston and the head was evaluated with computer simulation. Two different indicator cycles of the same engine (in the automotive and aircraft version) were analyzed to extrapolate three constants that define the engine family: • The contributing factor of compression (the exponent of the polytrophic curve n) • The contributing factors of combustion (a constant and an exponent) These contributing factors were examined and quantified separately. The paper is composed of two parts: the first part highlights the ultimate loads on critical engine parts while the second details the method for the extrapolation of the ultimate power output value. Successive experimental tests performed on the engine confirmed the simple method described herein.

AN INNOVATIVE METHOD FOR DETERMINING MAXIMUM POWER OBTAINABLE FROM A COON RAIL TURBOCHARGED DIESEL ENGINE STARTING FROM EXPERIMENTAL DATA

PIANCASTELLI, LUCA;FRANCIA, DANIELA
2008

Abstract

This paper presents an experimental method for determining the maximum power obtainable from an aircraft diesel engine derived from the automotive field. Several tests were performed to estimate the real values of pressure and thermal loads on the piston and head. The simple and original method described in this paper made it possible to define two constants for the description of the engine-performance-envelope. Maximum allowable pressure on the piston and the head was evaluated with computer simulation. Two different indicator cycles of the same engine (in the automotive and aircraft version) were analyzed to extrapolate three constants that define the engine family: • The contributing factor of compression (the exponent of the polytrophic curve n) • The contributing factors of combustion (a constant and an exponent) These contributing factors were examined and quantified separately. The paper is composed of two parts: the first part highlights the ultimate loads on critical engine parts while the second details the method for the extrapolation of the ultimate power output value. Successive experimental tests performed on the engine confirmed the simple method described herein.
2008
The 13th International Conference on Applied Mechanics and Mechanical Engineering- AMME 13
123
133
L.PIANCASTELLI; D. FRANCIA
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/66314
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