Multiple Jet Correlations for Gas Turbine Engine Combustor Design

Abstract

A correlation method has been developed for predicting the temperature field produced by a single row of closely-spaced jets penetrating into a hot confined crossflow. The correlation procedure predicts the temperature field as a function of the distance downstream of the jet injection plane and pertinent geometric and flow variables. Predicted results are compared with measured data. The tests are selected to represent combinations of geometries or flow variables which give strong verification of the correlations and which are pertinent to gas turbine engine combustor design.

An empirical model for the mixing of a row of dilution jets with a confined crossflow

“…3 are somewhat less cumbersome than those in Ref. 4, and the relative importance of each of the independent variables in the correlations is more readily apparent. In this paper, the effect of parametric variation of each of the independent variables on both the experimental and predicted profiles (using she correlations of Ref.…”

“…Although the geometries and test c,mditions of the experimental data base are representativt, of current design practice for annular gas turbine combustors, the flow model cannot completely describe dilution zone performance, since, as discussed by Cox in Ref. 4, the effects of liner cooling airflow, non-uniform dilution zone inlet temperature distribution, and flow area convergence in the dilution zone are not considered. Also, the experiments considered injection from one side toward an opposite wall, thu!.…”

Effect of Geometrical Parameters on the Exit Pattern Factors Of An Annular Combustor: An Experimental Study

“…Three major components which contribute to form the combustor exit radial temperature profile are; the primary zone exit temperature profile, dilution zone mixing temperature profile and cooling jet mixing temperature profile [4] [5]. Any pre-combustion zone geometrical parameter and characteristics of swirler and atomizer which directly control the combustion phenomena may influence the primary zone exit temperature profile, which in turn affects the combustor exit pattern factors.…”

Temperature Profile Development in Turbulent Mixing of Coolant Jets With a Confined Hot Cross Flow

“…The temperature profile at the combustor exit depends decisively on the mixing of the cooling air jets with the combustion products in the dilution zone (1), (2), (3). Prediction methods are here of cardinal importance not only due to the number of parameters involved but also because cf the increasir^5 costs of experimental investigations.…”