Title

Performance Evaluation Of A Reverse-Flow Gas Turbine Combustor Using Modified Hydraulic Analogy

Keywords

Flow-split pressure variation; Hydraulic analogy; Overall pressure loss; Reverse flow gas turbine combustor

Abstract

Experiments were performed on equivalent two-dimensional axi-symmetric combustor model using modified hydraulic analogy in the Froude number range of 0.04 to 0.22, which is analogous to the inlet Mach number in the axisymmetric combustor geometry. Flow visualisation was performed to ascertain the extent of applicability of hydraulic analogy for investigation in such complex combustor geometry. Studies were performed to record variation in the static pressure at different locations/sections in the combustor, flow-split through liner holes and overall pressure loss as function of inlet Mach numbers and dump-gaps (1 mm, 2 mm and 4 mm). It was seen that hydraulic analogy can give good estimate of the overall flow pattern as well as flow-splits through various liner holes. Investigations revealed that flow-split through the outer annulus ranged from ≈ 35% to 52%, while through the inner annulus it remained from ≈ 33% to 39%. The contribution of the dilution holes and primary holes remained in the range of 41% to 53% and 9% to 15%, respectively. It was also found that to optimize the overall pressure loss in such a combustor the design should have provision for adjustment of dump-gap in the range of 1 mm to 2 mm depending on the need based on its operating inlet Mach number.

Publication Date

9-1-2004

Publication Title

Journal of the Institution of Engineers (India): Mechanical Engineering Division

Volume

85

Issue

1 SEP.

Number of Pages

34-44

Document Type

Article

Personal Identifier

scopus

Socpus ID

30444457955 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/30444457955

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