A Method for Predicting Contra Rotating Propellers Off-Design Performance

Dubosc, Matthieu; Tantot, Nicolas; Beaumier, Philippe; Delattre, Grégory

doi:10.1115/gt2014-25057

Cited by 3 publications

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A Propeller Model for Steady-State and Transient Performance Prediction of Turboprop and Counter-Rotating Open Rotor Engines

Silva

Bringhenti

Tomita

et al. 2018

Journal of Engineering for Gas Turbines and Power

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This paper describes a methodology used for propeller performance estimation, which was implemented in an in-house modular program for gas turbine performance prediction. A model based on subsonic generic propeller maps and corrected for compressibility effects, under high subsonic speeds, was proposed and implemented. Considering this methodology, it is possible to simulate conventional turboprop architectures and counter-rotating open rotor (CROR) engines in both steady-state and transient operating conditions. Two simulation scenarios are available: variable pitch angle propeller with constant speed; or variable speed propeller with constant pitch angle. The simulations results were compared with test bench data and two gas turbine performance commercial software packages were used to fulfill the model validation for conventional turboprop configurations. Furthermore, a direct drive CROR engine was simulated using a variable inlet guide vanes (VIGV) control strategy during transient operation. The model has shown to be able to provide several information about propeller-based engine performance using few input data, and a comprehensive understanding on steady-state and transient performance behavior was achieved in the obtained results.

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A Propeller Model for Steady-State and Transient Performance Prediction of Turboprop and Counter-Rotating Open Rotor Engines

Silva

Bringhenti

Tomita

et al. 2018

Journal of Engineering for Gas Turbines and Power

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Influence of Variable Geometry Compressor on Transient Performance of Counter-Rotating Open Rotor Engines

Silva

Bringhenti

Tomita

et al. 2018

Journal of Engineering for Gas Turbines and Power

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This work describes a methodology used for counter-rotating (CR) propellers performance estimation. The method is implemented in an in-house program for gas turbine performance prediction, making possible the simulation of the counter-rotating open rotor (CROR) architecture. The methodology is used together with a variable geometry compressor control strategy to avoid surge conditions. Two cases are simulated under transient operation for both fixed and variable geometry compressor. The influence of the variable geometry control on the transient performance of CROR engines is evaluated and a comprehensive understanding on the transient behavior of this type of engine could be obtained. It is shown that the use of the variable geometry compressor control does not significantly affect the overall engine performance, while avoiding the surge conditions, thus ensuring the engine operation safety.

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Effect of tip speed ratio of rear stage impeller on the performance of contra-rotating wind turbine

Li¹,

Li²

2015

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Abstract. Based on the experimental research and numerical calculation of the Contra-Rotating Wind Turbine (CRWT) by using the technique of the aero-engine and propeller, the effect of the tip speed ratio of the rear stage on the performance of the contra-rotating wind turbine is studied by using numerical simulation method in this paper. The computational results show that there is an optimal tip speed ratio on the rear stage of the contra-rotating wind turbine under medium wind speed in order to achieve the highest output power. Below the optimal value, boundary layer separation of the rotor blade is serious, output power is lower, and output torque is larger; above the optimal value, the opposite situation occurs. Through analyzing the computational results, the optimal value of tip speed ratio of rear stage impeller is 1.667.

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A Method for Predicting Contra Rotating Propellers Off-Design Performance

Cited by 3 publications

References 0 publications

A Propeller Model for Steady-State and Transient Performance Prediction of Turboprop and Counter-Rotating Open Rotor Engines

A Propeller Model for Steady-State and Transient Performance Prediction of Turboprop and Counter-Rotating Open Rotor Engines

Influence of Variable Geometry Compressor on Transient Performance of Counter-Rotating Open Rotor Engines

Effect of tip speed ratio of rear stage impeller on the performance of contra-rotating wind turbine

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