Design and Numerical Analysis of a Vane Shaped Receiver Hole in a Cover-Plate Preswirl System

Abstract

In a cover-plate system, rotating receiver hole is an important component, because its structure and characteristics directly influence the aerodynamic loss and cooling performance in the preswirl system. A new type of vane shaped (VS) receiver hole was designed and presented in this paper. Numerical simulations were carried out to compare the performances among high-radius direct transfer system (model-A), low-radius cover-plate system with simple drilled (SD) receiver holes (model-B), and low-radius cover-plate system with VS receiver holes (model-C). Results indicate that for the operating conditions simulated here, temperature drop effectiveness of the high-radius preswirl system is much better compared to the low-radius system with SD receiver hole. With VS receiver hole, the aerodynamic loss in model-C is the lowest. The nondimensional static pressure at preswirl nozzle exit is only 0.93, around 10% lower than model-B. Moreover, it has a more remarkable cooling performance. The temperature drop effectiveness of model-C can be as high as 0.52, around 67.7% higher compared to model-A. The system with VS receiver hole could not only realize the advantage of low leakage flow as a low-radius system, but also could achieve higher temperature drop compared to high-radius system.

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

“…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.…”

“…[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.…”

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

“…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.…”

“…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.…”

Design and Test of High-Speed Fertilizer Point-Applied Device

“…By controlling the opening and closing of the flap, Zhang et al, (2018), intermittently distributed a continuous stream of fertilizer particles into the soil layer at a depth of 7-23 cm directly below the seeds. Liu et al, (2018;, used the spaced fertilizer cavity to take fertilizer in precise quantity, with positive pressure airflow to carry the fertilizer particles to be thrown out quickly, so as to realize the fertilization of the root zone hole application. Wu et al, (2018), used a rocker to control the opening and closing of a duckbill valve to achieve fertilizer burrowing.…”