Effect of pressure transducer position on measured cylinder pressure diagram of high speed diesel engines

Hountalas, DT; Anestis, A

dc.contributor.author	Hountalas, DT	en
dc.contributor.author	Anestis, A	en
dc.date.accessioned	2014-03-01T01:13:42Z
dc.date.available	2014-03-01T01:13:42Z
dc.date.issued	1998	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12673
dc.subject	Cylinder pressure	en
dc.subject	Diesel engine	en
dc.subject	Transducer position	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	Combustion chambers	en
dc.subject.other	Computer simulation	en
dc.subject.other	Diesel engines	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Finite difference method	en
dc.subject.other	Mathematical models	en
dc.subject.other	Measurement errors	en
dc.subject.other	Pressure measurement	en
dc.subject.other	Cylinder pressure diagrams	en
dc.subject.other	Pressure transducers	en
dc.title	Effect of pressure transducer position on measured cylinder pressure diagram of high speed diesel engines	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0196-8904(97)10009-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0196-8904(97)10009-7	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The cylinder pressure diagram is a valuable source of information for reciprocating internal combustion engines. If processed, it provides information concerning the combustion process inside the engine cylinder. During this process, a problem that usually arises is the proper mounting of the pressure sensor on the cylinder head. The optimum is to flush-mount the transducer to the cylinder head so that it can be directly in contact with the gas. Unfortunately, in many cases, and mainly in small size, high speed commercial engines, this is not always possible. For this reason, the engineer must position the transducer in a location away from the cylinder head to bring it to continuous contact with the cylinder gas through a duct. From experiments, we find that this may result in errors in the measured values of the gas pressure that differ from the actual ones inside the combustion chamber. In the case of spark ignition engines, we face this problem by using pressure sensors mounted on the engine spark plug, but in the case of Diesel engines, we must mount the transducer separately. The main scope of the present work is to examine the effect of the transducer position on the measured pressure diagram in high speed diesel engines. For this purpose, in the present work, a theoretical investigation is conducted using a simulation model developed by the authors, where the unsteady Bow problem in the connecting pipeline from the combustion chamber to the transducer is solved using a finite difference scheme. A simple combustion model is used to simulate the operation of a high speed diesel engine at various conditions. The theoretical investigation involves the study of the effect of the connecting pipe geometry (diameter and length) and engine speed and load on the measured pressure diagram and on the parameters derived from it. From this investigation, important results are obtained that enable us to determine the magnitude of the error in pressure measurement that results from the positioning of the transducer away from the combustion chamber. The results reveal the limits within which the pressure measurements are reliable and may be possibly used to develop a method for correcting the measured pressure diagram. (C) 1998 Elsevier Science Ltd.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy Conversion and Management	en
dc.identifier.doi	10.1016/S0196-8904(97)10009-7	en
dc.identifier.isi	ISI:000071947200005	en
dc.identifier.volume	39	en
dc.identifier.issue	7	en
dc.identifier.spage	589	en
dc.identifier.epage	607	en