Experimental study on a hybrid vortex reducer system in reducing the pressure drop in a rotating cavity with radial inflow

Song, Wei; Mao, Junkui; Yan, Jiaxi; Han, Xingsi; Tu, Zecan; Tian, Ranran

doi:10.1016/j.expthermflusci.2019.109942

Cited by 11 publications

(3 citation statements)

References 17 publications

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“…Liang et al (2015) used a combination of long and short tubes to reduce the weight. Wei et al (2020) achieved the same goal by counter-rotating the air intake. Furthermore, Wei et al (2019) established a mathematical model for predicting the pressure drop of a tubed vortex reducer based on the assumptions of incompressibility and adiabatic reversibility.…”

Section: Introductionmentioning

confidence: 85%

Flow and Heat Transfer in a Co-Rotating Cavity with Tubes: A Coupled Prediction Model

Shen

Suo-fang

Liang

2022

JAFM

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In previous studies, researchers established mathematical models for predicting the pressure coefficient in simple cavities and tubed vortex reducers based on the assumptions of incompressibility and adiabatic reversibility. However, these mathematical models are not suitable for engineering design and cannot predict the internal pressure and temperature. In this study, we first derived mathematical equations for predicting the pressure drop and temperature change in a tubed vortex reducer, by considering the irreversible loss at the tube inlet. To compensate for the shortcomings of the incompressibility assumption, we developed an iterative alternating calculation method that revises the density. Subsequently, we established a coupled prediction model based on the aforementioned equations and methods. The verified Reynolds stress model results proved that the coupled prediction model and the single prediction model, which represents the incompressible case, yield similar results in predicting pressure under low-rotating-speed conditions. However, as the rotating speed was increased, the error of the single prediction model gradually increased, whereas the coupled prediction model still had good prediction accuracy. With an increase in the length and number of tubes, the pressure drop showed a decreasing trend, whereas the temperature change did not fluctuate significantly.

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Section: Introductionmentioning

confidence: 85%

Flow and Heat Transfer in a Co-Rotating Cavity with Tubes: A Coupled Prediction Model

Shen

Suo-fang

Liang

2022

JAFM

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“…Compared to traditional vortex reducers [22,23], an NVR generates better drag reduction performance while maintaining low weight. In particular, the developed design strategy ensures that the NVR does not suffer from a hysteresis phenomenon, which may occur in tubeless and hybrid vortex reducers [16,30]. Training a reasonable surrogate model is beneficial for shortening the design cycle.…”

Section: Performance Evaluation Of the Nvrmentioning

confidence: 99%

“…However, it should be noted that simple optimization cannot fundamentally tackle the defects of traditional vortex reducers. Interestingly, Wei et al [30] developed a hybrid vortex reducer (HVR) by combining nozzles and tubes, and the test results demon strated that it could significantly minimize the tube length while maintaining drag reduc tion performance. However, their results indicated that the HVR still had unsteady air entraining characteristics.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of a Novel Vortex Reducer in a Co-Rotating Cavity of Aeroengines

Shen,

Wang,

Wang

et al. 2024

Aerospace

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Improving airflow pressure is of great significance for the cooling and sealing of aeroengines. In a co-rotating cavity with radial inflow, vortex reducers are used to decrease the pressure drop. However, the performance of traditional vortex reducers is limited by their drag reduction mechanism and cannot meet the needs of next-generation aeroengines. In this study, a novel vortex reducer (NVR) consisting of de-swirl shroud orifices and fins is proposed. Meanwhile, a design strategy is developed to ensure the NVR provides steady airflow and excellent drag reduction performance. Furthermore, experiments and numerical simulations are utilized to investigate the flow characteristics and drag reduction mechanism of the NVR. The results reveal that the de-swirl jets created by the de-swirl shroud orifices limit the enhancement of the Ekman layers at large radii, while the fins break down the high-speed vortices at small radii. Compared to a traditional finned vortex reducer with identical fins, the pressure drop of the NVR is relatively reduced by 28.52%. Specifically, the pressure drop of the NVR is monotonous in the operating range, indicating its suitability for engineering. Finally, a surrogate model and particle swarm optimization (PSO) are utilized to identify the optimal parameters of the de-swirl shroud orifices in the design range. This study provides a potential solution for the design of next-generation vortex reducers.

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Numerical analysis of secondary airflow in a rotating cavity of a gas‐turbine at high operating points with vortex reducer implementation

et al. 2021

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Experimental study on a hybrid vortex reducer system in reducing the pressure drop in a rotating cavity with radial inflow

Cited by 11 publications

References 17 publications

Flow and Heat Transfer in a Co-Rotating Cavity with Tubes: A Coupled Prediction Model

Flow and Heat Transfer in a Co-Rotating Cavity with Tubes: A Coupled Prediction Model

Experimental and Numerical Investigation of a Novel Vortex Reducer in a Co-Rotating Cavity of Aeroengines

Numerical analysis of secondary airflow in a rotating cavity of a gas‐turbine at high operating points with vortex reducer implementation

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