Experimental Investigation of a Twin Fluid Atomizer Spray Using a Diode Laser Based Optical Patternator
-
M. Muralidhar
Abstract
An internally mixed twin fluid atomizer has been characterized in terms of its spray uniformity and liquid distribution by using an optical patternator. The atomizer was operated at an injection pressure of 819 kPa and images were acquired at three different planes normal to the injector axis for three gas-to-liquid ratio (GLR) cases. These planar images were processed and divided into ‘N’ rectangular sectors. Subsequently, the patternation indices were calculated based on the two newly defined indices, namely (i) mean-to-maximum ratio (MR) and (ii) global mean-to-maximum ratio (GMR). The MR and GMR attained a maximum value for 10% GLR as compared to other GLR cases, which indicated better distribution for 10% GLR case. The results from the mechanical patternator showed that the maximum normalized value of flow rate decreased slightly as the GLR was increased from 5 to 15% where the spray becomes finer. However, due to better spatial resolution, this trend was more perceptible in the optical patternation results even for 5 and 10% GLR. The trend of the qualitative information of the spray uniformity was similar to that of the results from the mechanical patternator. Thus, the present optical patternation technique could be employed effectively to predict spray uniformity for different operating conditions of an internally mixed atomizer.
Copyright © 2011 De Gruyter
Articles in the same Issue
- Future Jet Technologies. Part A. Air, Land and Marine Applications of Thrust Vectoring
- Aerodynamic Characteristics of Three-Dimensional Surface-Mounted Objects in Tandem Arrangement
- GUI Type Fault Diagnostic Program for a Turboshaft Engine Using Fuzzy and Neural Networks
- Numerical Modeling of an Axisymmetric Trapped Vortex Combustor
- Optimization of a Francis Turbine Through Flow Simulation with a RNG k-ω Turbulence Model
- Control of Base Flows with Micro Jets
- Analysis on Cavitation Characteristics of Flow in a Francis Turbine with Different Content of Non-Condensable Gas
- Research on the Optimum Clocking Position in Axial-Flow Turbomachinery
- Asymmetrical Flow Simulation of Icing Effects in S-Duct Inlets at Angle of Attack
- Experimental Investigation of a Twin Fluid Atomizer Spray Using a Diode Laser Based Optical Patternator
Articles in the same Issue
- Future Jet Technologies. Part A. Air, Land and Marine Applications of Thrust Vectoring
- Aerodynamic Characteristics of Three-Dimensional Surface-Mounted Objects in Tandem Arrangement
- GUI Type Fault Diagnostic Program for a Turboshaft Engine Using Fuzzy and Neural Networks
- Numerical Modeling of an Axisymmetric Trapped Vortex Combustor
- Optimization of a Francis Turbine Through Flow Simulation with a RNG k-ω Turbulence Model
- Control of Base Flows with Micro Jets
- Analysis on Cavitation Characteristics of Flow in a Francis Turbine with Different Content of Non-Condensable Gas
- Research on the Optimum Clocking Position in Axial-Flow Turbomachinery
- Asymmetrical Flow Simulation of Icing Effects in S-Duct Inlets at Angle of Attack
- Experimental Investigation of a Twin Fluid Atomizer Spray Using a Diode Laser Based Optical Patternator
