Experimental Investigation of Harmonic Interaction Effects for Perforates

2005 ◽  
Author(s):  
Hans Bodén
Keyword(s):  
Experimental Investigation ◽  
Interaction Effects ◽  
Harmonic Interaction

Compressor/Diffuser/Combustor Aerodynamic Interactions in Lean Module Combustors

2008 ◽  
Vol 130 (1) ◽  
Author(s):  
A. Duncan Walker ◽  
Jon F. Carrotte ◽  
James J. McGuirk
Keyword(s):  
Experimental Investigation ◽  
Guide Vane ◽  
Interaction Effects ◽  
Single Stage ◽  
Flow Rates ◽  
Fuel Injectors ◽  
Compressor Rotor ◽  
Outer Annulus ◽  
Mass Flows ◽  
External Aerodynamics

The paper reports an experimental investigation into the possibility of increased interactions between combustor external aerodynamics and upstream components, e.g., prediffuser, compressor outlet guide vane (OGV), and even the compressor rotor, caused by the trend in lean module fuel injectors to larger mass flows entering the combustor cowl. To explore these component interaction effects, measurements were made on a fully annular rig comprising a single stage compressor, an advanced integrated OGV/prediffuser, followed by a dump diffuser and a generic combustor flametube with metered cowl and inner/outer annulus flows. The flow split entering the cowl was increased from 30% to 70%. The results demonstrate that, with fixed geometry, as the injector flow increases, the performance of the prediffuser and feed annuli suffer. Prediffuser losses increase and at high injector flow rates, the diffuser moves close to separation. The substantial circumferential variation in cowl flow can feed upstream and cause rotor forcing. Notable differences in performance were observed inline and between injectors at the OGV exit, suggesting that geometry changes such as an increased dump gap or nonaxisymmetric prediffuser designs may be beneficial.

Compressor/Diffuser/Combustor Aerodynamic Interactions in Lean Module Combustors

2007 ◽  
Author(s):  
A. Duncan Walker ◽  
Jon F. Carrotte ◽  
James J. McGuirk
Keyword(s):  
Experimental Investigation ◽  
Interaction Effects ◽  
Single Stage ◽  
Flow Rates ◽  
Fuel Injectors ◽  
Component Interaction ◽  
Compressor Rotor ◽  
Outer Annulus ◽  
Mass Flows ◽  
External Aerodynamics

The paper reports an experimental investigation into the possibility of increased interactions between combustor external aerodynamics and upstream components e.g. pre-diffuser, compressor OGV and even the compressor rotor, caused by the trend in lean module fuel injectors to larger mass flows entering the combustor cowl. To explore these component interaction effects, measurements were made on a fully annular rig comprising a single stage compressor, an advanced integrated OGV/pre-diffuser, followed by a dump diffuser and a generic combustor flametube with metered cowl and inner/outer annulus flows. The flow split entering the cowl was increased from 30% to 70%. The results demonstrate that, with fixed geometry, as the injector flow increases, the performance of the pre-diffuser and feed annuli suffer. Pre-diffuser losses increase and at high injector flow rates the diffuser moves close to separation. The substantial circumferential variation in cowl flow can feed upstream and cause rotor forcing. Notable differences in performance were observed inline and between injectors at OGV exit, suggesting that geometry changes such as an increased dump gap or non axisymmetric pre-diffuser designs may be beneficial.

Do moods and expectancies have unique or interactive effects?: An experimental investigation

2014 ◽  
Author(s):  
Shane Close ◽  
Victoria Adkins ◽  
Kandice Perry ◽  
Katheryn Eckles ◽  
Jill Brown ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Interactive Effects
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