Unsteady CFD Simulations of Contra-Rotating Propeller Propulsion Systems

Stürmer, Arne

doi:10.2514/6.2008-5218

Cited by 49 publications

(20 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All CFD simulations are performed utilizing the DLR TAU-Code for both the steady RANS and the uRANS computations. For the latter, much know-how was transferred from a process chain that has already been successfully applied in a number of recent propeller and CROR investigations [1,[9][10][11][12][13][14], where validation with wind tunnel test data has shown high-quality engine performance predictions for various isolated and installed configurations is achievable, with deviations of less than 1% to the experimental values.…”

Section: Computational Strategymentioning

confidence: 99%

DLR TAU-Code uRANS Turbofan Modeling for Aircraft Aerodynamics Investigations

Stuermer¹

2019

Aerospace

Self Cite

View full text Add to dashboard Cite

In the context of an increased focus on fuel efficiency and environmental impact, turbofan engine developments continue towards larger bypass ratio engine designs, with Ultra-High Bypass Ratio (UHBR) engines becoming a likely power plant option for future commercial transport aircraft. These engines promise low specific fuel consumption at the engine level, but the resulting size of the nacelle poses challenges in terms of the installation on the airframe. Thus, their integration on an aircraft requires careful consideration of complex engine–airframe interactions impacting performance, aeroelastics and aeroacoustics on both the airframe and the engine sides. As a partner in the EU funded Clean Sky 2 project ASPIRE, the DLR Institute of Aerodynamics and Flow Technology is contributing to an investigation of numerical analysis approaches, which draws on a generic representative UHBR engine configuration specifically designed in the frame of the project. In the present paper, project results are discussed, which aimed at demonstrating the suitability and accuracy of an unsteady RANS-based engine modeling approach in the context of external aerodynamics focused CFD simulations with the DLR TAU-Code. For this high-fidelity approach with a geometrically fully modeled fan stage, an in-depth study on spatial and temporal resolution requirements was performed, and the results were compared with simpler methods using classical engine boundary conditions. The primary aim is to identify the capabilities and shortcomings of these modeling approaches, and to develop a best-practice for the uRANS simulations as well as determine the best application scenarios.

show abstract

Section: Computational Strategymentioning

confidence: 99%

DLR TAU-Code uRANS Turbofan Modeling for Aircraft Aerodynamics Investigations

Stuermer¹

2019

Aerospace

Self Cite

View full text Add to dashboard Cite

show abstract

“…Stuermer [4] made a detailed analysis of the complex aerodynamic interactions between the two rotors as well as an in-depth analysis of the blade and rotor forces. In order to assess the static and dynamic response of an aft propeller of Contra rotating propeller (CRP) for entire range of its operation, Suryanarayana et al [5] made an analysis using finite element method validated it by analytical approach.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Cotra Rotating Propellers

Feng¹,

Chen²,

Guo³

et al. 2017

Proceedings of the 2017 International Conference on Manufacturing Engineering and Intelligent Materials (ICMEIM 2017)

View full text Add to dashboard Cite

In this paper, numerical simulation based on Reynolds-averaged Navier-Stokes (RANS) equation and   k SST turbulence model is performed to investigate the hydrodynamic performance of Contra rotating propeller (CRP). The whole computation domain is divided into three sub-domains, which include the two rotating domains containing the fore and aft propellers, and the left outer domain. MRF(Multiple reference frame)coordinate system technique is used to simulate the rotation of the propeller. Fully structured gridding strategy is used to ensure the accuracy of the calculation and reduce computation time. The numerical simulation is verified by the experimental data of CRP6 and CRP7. Then, further analysis of the fluctuation of the thrust and torque is performed, as well as the hydrodynamic interference between the two forward and aft propellers.

show abstract

“…Stürmer, separately looking at a generic 8x8 bladed pusher CROR configuration, found that the complex interaction of the forward blade wakes and tip vortices with the aft rotor could be captured by the DLR TAU-code [4]. He showed that the wakes of the forward rotor are ingested by the aft rotor which leads to periodic fluctuations in the blade forces and has a strong impact on the root flow topology.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aft Rotor on the Inter-Rotor Flow of an Open Rotor Propulsion System

Slaboch

Stephens

Zante

et al. 2016

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

The effects of the aft rotor on the inter-rotor flow field of an open rotor propulsion rig were examined. A Particle Image Velocimetry (PIV) dataset that was acquired phase locked to the front rotor position has been phase averaged based on the relative phase angle between the forward and aft rotors. The aft rotor phase was determined by feature tracking in raw PIV images through an image processing algorithm. The effects of the aft rotor potential field on the inter-rotor flow were analyzed and shown to be in reasonably good agreement with Computational Fluid Dynamics (CFD) simulations. The aft rotor position was shown to have a significant upstream effect, with implications for front rotor interaction noise. It was found that the aft rotor had no substantial effect on the position of the forward rotor tip vortex but did have a small effect on the circulation strength of the vortex when the rotors were highly loaded.

show abstract

Unsteady CFD Simulations of Contra-Rotating Propeller Propulsion Systems

Cited by 49 publications

References 5 publications

DLR TAU-Code uRANS Turbofan Modeling for Aircraft Aerodynamics Investigations

DLR TAU-Code uRANS Turbofan Modeling for Aircraft Aerodynamics Investigations

Numerical Simulation of Cotra Rotating Propellers

Effect of Aft Rotor on the Inter-Rotor Flow of an Open Rotor Propulsion System

Contact Info

Product

Resources

About