Library Subscription: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-130-9

International Heat Transfer Conference 6
August, 7-11, 1978, Toronto, Canada

HEAT TRANSFER IN A COOLED DIESEL INJECTOR NOZZLE

Get access (open in a dialog) DOI: 10.1615/IHTC6.1930
pages 1-5

Abstract

Cooled injector nozzles are currently used on highly rated medium sized diesel engines and on duel fuelled engines. Their use is very likely to increase in the future. The nozzle has to he kept within a narrow temperature band to avoid seat softening and fuel trumpeting on the one hand, and cold corrosion on the other.
The heat transfer situation for a production cooled nozzle has been modelled using a finite element heat transfer program. The model is described in the paper and outputs of temperature distributions within the nozzle are given. Comparisons of the model predictions with measurements taken on a running engine show very good agreement.
The effect of the following parameters on the nozzle temperature distribution has been investigated:
(a) Brake mean effective pressure.
(b) Coolant inlet temperature.
(c) Coolant flow rate.
(d) Fuel temperature.
(e) Property variation of fuel and coolant.
The relative importance of these parameters are assessed and conclusions are drawn on the best method of controlling the nozzle temperature.