An experimental investigation of a nonreacting multiple jet mixing with a confined crossflow has been conducted. Flow and geometric conditions were varied in order to examine favorable parameters for mixing. The requirement for a rapid and intense mixing process originates from combustion applications, especially the RQL-combustion concept. Thus, the jets were perpendicularly injected out of one opposed row of circular orifices into a heated crossflow in a rectangular duct. Spacing and hole size were varied within the ranges referring to combustor applications. The results presented are restricted to an in-line orientation of opposed jet axis. Temperature distribution, mixing rate, and standard deviation were determined at discrete downstream locations. Best, i.e., uniform mixing can be observed strongly depending on momentum flux ratio. For all geometries investigated, an optimum momentum flux ratio yields to a homogeneous temperature distribution in the flow field downstream of the injection plane. Overly high ratios deteriorate the mixing process due to the mutual impact of the opposed entraining jets along with a thermal stratification of the flowfield. Correlations are introduced describing the dependency of optimum momentum flux ratio on mixing hole geometry. They allow the optimization of jet-in-crossflow mixing processes in respect to uniform mixing.
Skip Nav Destination
Article navigation
April 1997
Research Papers
Optimization of Multiple Jets Mixing With a Confined Crossflow
Th. Doerr,
Th. Doerr
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
Search for other works by this author on:
M. Blomeyer,
M. Blomeyer
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
Search for other works by this author on:
D. K. Hennecke
D. K. Hennecke
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
Search for other works by this author on:
Th. Doerr
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
M. Blomeyer
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
D. K. Hennecke
Department of Flight Propulsion, Technical University Darmstadt, Darmstadt, Federal Republic of Germany
J. Eng. Gas Turbines Power. Apr 1997, 119(2): 315-321 (7 pages)
Published Online: April 1, 1997
Article history
Received:
March 15, 1995
Online:
November 19, 2007
Citation
Doerr, T., Blomeyer, M., and Hennecke, D. K. (April 1, 1997). "Optimization of Multiple Jets Mixing With a Confined Crossflow." ASME. J. Eng. Gas Turbines Power. April 1997; 119(2): 315–321. https://doi.org/10.1115/1.2815577
Download citation file:
Get Email Alerts
Study Of Tandem Rotor Dual Wake Interaction With Downstream Stator Under Unsteady Numerical Approach
J. Eng. Gas Turbines Power
An Efficient Uncertainty Quantification Method Based on Inter-Blade Decoupling for Compressors
J. Eng. Gas Turbines Power (April 2025)
Experimental Design Validation of a Swirl-Stabilized Burner With Fluidically Variable Swirl Number
J. Eng. Gas Turbines Power (April 2025)
Experimental Characterization of a Bladeless Air Compressor
J. Eng. Gas Turbines Power (April 2025)
Related Articles
Mixing of Multiple Jets With a Confined Subsonic Crossflow: Part I—Cylindrical Duct
J. Eng. Gas Turbines Power (October,1997)
The Effects of Air Preheat and Number of Orifices on Flow and
Emissions in an RQL Mixing Section
J. Fluids Eng (November,2007)
Mixing of Multiple Jets With a Confined Subsonic Crossflow: Part II—Opposed Rows of Orifices in Rectangular Ducts
J. Eng. Gas Turbines Power (July,1999)
Gas Turbine Combustor Flow Structure Control Through Modification of the Chamber Geometry
J. Eng. Gas Turbines Power (September,2011)
Related Chapters
Cavitation in Fractal Geometry Orifices
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Numerical Simulation Research on a Fixed Bed Gasifier
International Conference on Information Technology and Management Engineering (ITME 2011)