computational studies of lobed forced mixer flows

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Computational studies of lobed forced mixer flows ...

Computational studies of lobed forced mixer flows. H. Hu 1, S. S. Wu 1 S. C. M. Yu 2 Journal of Thermal Science volume 7, Article number: 22 (1998) Cite this article. 43 Accesses. 1 Citations. Metrics details. Abstract. Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent ...

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Computational studies of lobed forced mixer flows — The ...

Computational studies of lobed forced mixer flows. H. Hu, S.S. Wu, Ching Man Yu. Research output: Journal article publication › Journal article › Academic research › peer-review. 2 Citations (Scopus) Overview; Abstract. Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time ...

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Computational studies of lobed forced mixer flows - NASA/ADS

Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent compressible Navier-Stokes equations and discretized in the finite-difference form. A simple two-layer eddy viscosity model has also been used to account for the turbulence. Computed results are compared with some of the ...

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[PDF] Computational Studies of Lobed Forced Mixer Flows ...

Computational Studies of Lobed Forced Mixer Flows @inproceedings{HuComputationalSO, title={Computational Studies of Lobed Forced Mixer Flows}, author={H. Hu} } H. Hu; Full Navier Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent compressible Navier-Stokes equations

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Computational studies of lobed forced mixer flows ...

Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent compressible Navier-Stokes equations and discretized in the finite-difference form. A simple two-layer eddy viscosity model has also been used to account for the turbulence. Computed results are compared with some of the ...

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22 1 - Iowa State University

H. Hu et al. Computational Studies of Lobed Forced Mixer Flows 23 lobe penetration consisted of straight parallel side- walls. They also found that higher strength would result in a faster mixing rate and hence would fa- cilitate the condition of achieving spatial uniformity downstream of the mixer. Based on flow visualization tests in a water tunnel, Werle, Paterson and Presz [5] suggested ...

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Computational Studies of Lobed Forced Mixer Flows_知网百科

Computational Studies of Lobed Forced Mixer Flows-Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the timedependent compress...

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Computational study of viscous effects on lobed mixer flow ...

23/05/2012  Flow-field of an axisymmetric lobed mixer Journal of Thermal Science, Vol. 13, No. 1 Linear and Non-Linear Turbulence Model Predictions of Vortical Flows in Lobed Mixers

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Computational study of viscous effects on lobed mixer flow ...

O'Sullivan, MN and Krasnodebski, JK and Waitz, IA and Greitzer, EM and Tan, CS and Dawes, WN (1996) Computational study of viscous effects on lobed mixer flow features and performance. Journal of Propulsion and Power, 12. pp. 449-456. ISSN 0748-4658. Full text not available from this repository. Abstract. This article describes a computational study of viscous effects on lobed mixer flowfields.

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Turbofan Forced Mixer Lobe Flow Modeling

convoluted lobes of forced mixer nozzles installed in modern commercial turbofan engines. The design of these forced mixer lobes has been traditionally accomplished by using experimental correlations to relate mixer performance to a variety of geometrical parameters. This process is typically an iterative one, relying heavily on experimental verification. While this process has been reasonab}y ...

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Computational Studies of Lobed Forced Mixer Flows_知网百科

Computational Studies of Lobed Forced Mixer Flows-Full Navier-Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the timedependent compress...

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Computational study of viscous effects on lobed mixer flow ...

23/05/2012  Flow-field of an axisymmetric lobed mixer Journal of Thermal Science, Vol. 13, No. 1 Linear and Non-Linear Turbulence Model Predictions of Vortical Flows in Lobed Mixers

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Turbofan Forced Mixer Lobe Flow Modeling

convoluted lobes of forced mixer nozzles installed in modern commercial turbofan engines. The design of these forced mixer lobes has been traditionally accomplished by using experimental correlations to relate mixer performance to a variety of geometrical parameters. This process is typically an iterative one, relying heavily on experimental verification. While this process has been reasonab}y ...

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Flow-field of an axisymmetric lobed mixer SpringerLink

Yu, S C M. Some Aspects of the Flows Behind Lobed Forced Mixers. International Communication in Heat Transfer, 1994, 21(6): 849–858. Article Google Scholar [10] Koutmos, P, McGuirk, J J. CFD Predictions of Lobed Mixer Performance. Computer Methods in Applied Mechanics and Engineering, 1995, 122: 131–144

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CFD predictions of lobed mixer performance - ScienceDirect

01/04/1995  Parametric numerical studies are then carried out to examine in detail the predicted flow and temperature fields in a practical lobed mixer/nozzle system. The predicted trends in global performance parameters such as the total pressure loss coefficients and overall thermal mixing efficiency are also investigated over a range of mixer inlet flow conditions. If the CFD approach is to be viewed ...

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Forced mixer lobes in ejector designs Journal of ...

23/05/2012  The Effect of Core Flow Turbulence on Planar Lobed-Mixer Nozzle Effectiveness. Justin Mickelsen, Cole Yarrington, Jeffrey Bons and Deryl Snyder; 21 June 2012. Control of Mixing and Reactive Flow Processes. Flowfield and Mixing of an Underexpanded Jet. S. Murugappan and E. Gutmark ; 2 May 2012 AIAA Journal, Vol. 42, No. 8. Passive Fuel-Air Mixing and Emissions Control Via Lobed

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Numerical Simulation of the Vortical Structures in a Lobed ...

performance and widen the applications of lobed mixers/nozzles, extensive studies about the mechanism by which the lobed mixers/nozzles substantially enhance mixing have also been conducted in past years. Based on pressure, temperature, and velocity measurements of the flow field downstream of a lobed mixer/nozzle, Paterson3, 4 revealed the existence of large-scale streamwise vortices in lobed ...

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A study on a lobed jet mixing flow by using stereoscopic ...

15/10/2001  In a continuing effort to study the mixing enhancement by large-scale streamwise vortices generated by a lobed nozzle, a high-resolution stereoscopic particle image velocimetry (PIV) system was used in the present study to conduct three-dimensional measurements of air jet flows exhausted from a lobed nozzle and a conventional circular nozzle. The three-dimensional instantaneous and ensemble ...

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Mixing Augmentation by Multiple Lobed Jets

02/05/2015  Hence, an optimum computational domain of 3x10 5 elements was chosen for the numerical simulations in the present study. Figure 7.4 shows the variation of centreline velocity decay for the jet configurations i.e. single lobed jet, multiple lobed jets and multiple round jets. Assuming self-similarity in the zone of established flow downstream of the potential core, the integral model shows

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(PDF) Experimental studies of mixing flows with streamwise ...

Manning [22] reported that the mixing thickness of the lobed mixer is on the order of the lobed height rather than the shear layer as observed in confluent mixers. Further comparison to confluent ...

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Computational study of viscous effects on lobed mixer flow ...

23/05/2012  Flow-field of an axisymmetric lobed mixer Journal of Thermal Science, Vol. 13, No. 1 Linear and Non-Linear Turbulence Model Predictions of Vortical Flows in Lobed Mixers

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J l ~ ¢~ Computat iona l Studies of Lobed Forced Mixer Flows

Full Navier Stokes Analyses have been conducted for the flows behind the trailing edge of a lobed forced mixer. The governing equations are derived from the time-dependent compressible Navier-Stokes equa-tions and discretized in the finite-difference form. A simple two-layer eddy viscosity model has also been used to account for the turbulence. Computed results are compared with some of the ...

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Some aspects of the flows behind lobed forced mixers — The ...

Flow visualization studies have been conducted using the smoke-wire and laser-sheet techniques to examine the flows behind lobed forced mixers of different trailing edge configurations (a square wave, a semi-circular wave and a triangular wave) at a matched velocity ratio across the lobe. The size of the wake region and the strength of the secondary flow shed by a lobe were found to be larger ...

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CFD predictions of lobed mixer performance - ScienceDirect

01/04/1995  Parametric numerical studies are then carried out to examine in detail the predicted flow and temperature fields in a practical lobed mixer/nozzle system. The predicted trends in global performance parameters such as the total pressure loss coefficients and overall thermal mixing efficiency are also investigated over a range of mixer inlet flow conditions. If the CFD approach is to be viewed ...

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Forced Mixer Nozzle Optimization - NASA Technical Reports ...

Forced Mixer Nozzle Optimization Computational fluid dynamic (CFD) and computational acoustic analyses (CAA) were performed for a TFE731-40 compound nozzle, a TFE731-60 mixer nozzle and an Energy Efficient Engine (E(sup 3)) mixer nozzle for comparison with available data. The CFD analyses were performed with a three dimensional, Navier-Stokes solution of the flowfield on an unstructured

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A study on a lobed jet mixing flow by using stereoscopic ...

15/10/2001  In a continuing effort to study the mixing enhancement by large-scale streamwise vortices generated by a lobed nozzle, a high-resolution stereoscopic particle image velocimetry (PIV) system was used in the present study to conduct three-dimensional measurements of air jet flows exhausted from a lobed nozzle and a conventional circular nozzle. The three-dimensional instantaneous and ensemble ...

Get Price

Forced mixer lobes in ejector designs Journal of ...

23/05/2012  The Effect of Core Flow Turbulence on Planar Lobed-Mixer Nozzle Effectiveness. Justin Mickelsen, Cole Yarrington, Jeffrey Bons and Deryl Snyder; 21 June 2012. Control of Mixing and Reactive Flow Processes. Flowfield and Mixing of an Underexpanded Jet. S. Murugappan and E. Gutmark ; 2 May 2012 AIAA Journal, Vol. 42, No. 8. Passive Fuel-Air Mixing and Emissions Control Via Lobed

Get Price

Mixing Augmentation by Multiple Lobed Jets

02/05/2015  Hence, an optimum computational domain of 3x10 5 elements was chosen for the numerical simulations in the present study. Figure 7.4 shows the variation of centreline velocity decay for the jet configurations i.e. single lobed jet, multiple lobed jets and multiple round jets. Assuming self-similarity in the zone of established flow downstream of the potential core, the integral model shows

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CFD predictions of lobed mixer performance - ScienceDirect

The method adopts a non-aligned mesh to solve the steady-state three-dimensional elliptic equations describing the flow within the lobes. The calculation of the downstream mixing duct is then coupled with the lobe flow predictions to allow for the prediction of the complete lobed mixer/nozzle system. The calculation method and some initial predictions have been presented in [1]. The basic ...

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(PDF) Experimental studies of mixing flows with streamwise ...

Manning [22] reported that the mixing thickness of the lobed mixer is on the order of the lobed height rather than the shear layer as observed in confluent mixers. Further comparison to confluent ...

Get Price