Experimental Testing and Numerical Analysis on the Nozzle Effects in Preswirl System

Liu, Yuxin; Liu, Gaowen; Kong, Xiaozhi; Wang, Yangang

doi:10.2514/1.b36700

Cited by 15 publications

(6 citation statements)

References 14 publications

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“…According to the conclusion drawn by Liu et al (2017), Liu et al (2018) , and Wu et al (2011), a reasonable match between numerical and experimental results using different turbulence models can be proved. Numerical results using the computational model in Liu et al (2018) together with mesh generation and computational methods in this paper were compared with experimental results presented. As can be seen in Fig.…”

Section: Computational Methods and Boundary Conditionsmentioning

confidence: 59%

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

2020

JAFM

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A novel design of cooling air supply system with dual row pre-swirl nozzles (DRPM) is promoted and investigated. Simplified theoretical analysis and numerical simulation are used to estimate the total temperature reduction and mass flow rate characteristic of DRPM and compared with single row pre-swirl nozzle model (SRPM). The results show that, both models have similar flow structure and the variation of total temperature reduction and dimensionless mass flow rate with rotational Reynolds number and pressure ratio is also similar. Which have an inflection point with the increase of rotational Reynolds number but increases monotonically with the variation of pressure ratio. The pre-swirl system has the maximum flow rate and temperature reduction when the inflow Angle equal to 0 or the swirl ratio equal to 1 at the inlet of the receiver hole. The increase in pressure ratio improves the total temperature reduction and dimensionless mass flow rate as well. In the range of rotational Reynolds number calculated, DRPM can increase the dimensionless mass flow rate by 3.0% but the total temperature reduction decreased by 37.8% in average compared with SRPM. On the other hand, the dimensionless mass flow rate increased by 2.8% and total temperature reduction decreased by 14.9% in average in the range of pressure ratio calculated. Numerical results are in good agreement with the results calculated by simplified theoretical formulas.

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Section: Computational Methods and Boundary Conditionsmentioning

confidence: 59%

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

2020

JAFM

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“…The k−ε turbulence model can well predict the flow field with a high Reynolds number. 51 Referring to the previous numerical simulation method of the pre-swirl system, 25,36,37 then the turbulence model was selected as the standard k−ε model. The SIMPLE algorithm was used to couple the velocity and pressure.…”

Section: Numerical Methods and Experimental Verificationmentioning

confidence: 99%

“…[34]. Especially, Liu et al 36,37 proposed a new type of a pre-swirl nozzle and receiver hole which can reduce the flow loss of the airflow, thereby improving the pre-swirl system performance. On this basis, some optimization studies for the nozzle and receiver hole have also been carried out to improve the performance of the pre-swirl system.…”

Section: Introductionmentioning

confidence: 99%

Effect of pre-swirl nozzle closure modes on unsteady flow and heat transfer characteristics in a pre-swirl system of aero-engine

Liu

Lei

Lin

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part G:

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The pre-swirl system is of great importance for temperature drop and cooling air supply. This study aims to investigate the influencing mechanism of heat transfer, nonuniform thermodynamic characteristics, and cooling air supply sensitivity in a pre-swirl system by the application of the flow control method of the pre-swirl nozzle. A novel test rig was proposed to actively control the supplied cooling air mass flow rate by three adjustable pre-swirl nozzles. Then, the transient problem of the pre-swirl system was numerically conducted by comparison with 60°, 120°, and 180° rotating disk cavity cases, which were verified with the experiment results. Results show that the partial nozzle closure will aggravate the fluctuation of air supply mass flow rate and temperature. When three parts of nozzles are closed evenly at 120° in the circumferential direction, the maximum value of the nonuniformity coefficient of air supply mass flow rate changes to 3.1% and that of temperature changes to 0.25%. When six parts of nozzles are closed evenly at 60° in the circumferential direction, the maximum nonuniformity coefficient of air supply mass flow rate changes to 1.4% and that of temperature changes to 0.20%. However, different partial nozzle closure modes have little effect on the average air supply parameters. Closing 14.3% of the nozzle area will reduce the air supply mass flow rate by 9.9% and the average air supply temperature by about 1 K.

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“…The calculation time can be saved using this method while ensuring the calculation accuracy. Referring to the previous numerical simulation method of the pre‐swirl system, 14,22,23 the turbulence model was selected as the standard k − ε model. The SIMPLE algorithm was used to couple velocity and pressure.…”

Section: System Configuration and Numerical Methodsmentioning

confidence: 99%

“…The relationship between temperature drop and power consumption proposed in Ref 20. was verified. Especially, Liu et al 22,23 proposed a new type of pre-swirl nozzle and receiver hole. It was proved that the use of the new nozzle and receiver hole can reduce the entropy loss of the airflow, thus improving the pre-swirl system performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of air supply parameters and non‐uniform characteristics in a cover‐plate pre‐swirl system with the adjustable flow path

Lei

Liu

2021

Int J Energy Res

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The pre-swirl system can transfer the cooling air from the compressor to the turbine rotor blades with a lower relative total temperature to avoid extreme thermal shock. This work proposes a novel test rig to investigate the flow and aero-thermal characteristics in a cover-plate type pre-swirl system. The performed experimental and numerical studies focus on the effects of the partial pre-swirl nozzle closing modes on the mass flow rate of air supply, temperature, and uniformities in a pre-swirl system by application of the pre-swirl noz-

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Experimental Testing and Numerical Analysis on the Nozzle Effects in Preswirl System

Cited by 15 publications

References 14 publications

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

A Novel Design of Cooling Air Supply System with Dual Row Pre-Swirl Nozzles

Effect of pre-swirl nozzle closure modes on unsteady flow and heat transfer characteristics in a pre-swirl system of aero-engine

Numerical analysis of air supply parameters and non‐uniform characteristics in a cover‐plate pre‐swirl system with the adjustable flow path

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