Numerical Study of a Fuel Centrifugal Pump with Variable Impeller Width for Aero-engines
-
Bin Wang
,
Huasheng Guan
Abstract
As typical pump with large flow rate and high reliability, centrifugal pumps in fuel system of aero-engines mostly regulate flow rate by flow bypass, which leads to low efficiency and large fuel temperature rise especially at low flow rate. An innovative fuel centrifugal pump with variable impeller width is a more effective way to regulate flow rate than flow bypass. To find external characteristics of the centrifugal pump with variable impeller width proposed in this paper, flow domain within the pump is simulated numerically and some primary performance parameters and their correlation are analyzed. Results show that flow rate of the pump can be regulated by variable impeller width and that efficiency for this scheme is higher than that for flow bypass. The higher outlet static pressure the pump runs at, the wider range of flow rates can be obtained with stronger nonlinear relationship between flow rate and impeller width.
Funding statement: Funding: The work in this paper was financially supported by the National Natural Science Foundation of China (grant no. 51205188).
Copyright reminder
The authors declare no conflicts of copyright.
Nomenclature
- Q
Numerical flow rate
- Qi
Theoretical flow rate
- Qr
Actual output flow rate after bypassing
- Qb
Bypassing flow rate
- b2
Blade width at outlet
- b3
Impeller width at the outlet after regulating
- D2
Impeller diameter at the outlet
- v2n
Absolute radial velocity at the impeller outlet
- Ψ2
Excretion coefficient
- u2
Peripheral velocity at impeller outlet
- pt1
Total pressure at the inlet
- pt2
Total pressure at the outlet
- ρ
Density of fluid
- g
Acceleration of gravity
- Hi
Impeller theoretical head
- Hr
Impeller theoretical head with correction
- H
Numerical pump head
- β2
Blade discharge angle
- η
Total efficiency of the pump
- ηω
Hydraulic efficiency of the pump
- Kl
Finite blade correction factor
- Ps
Impeller shaft power
- T
Impeller torque
- ω
Angle speed
- n
Rotational speed
- Z
Quantity of blade
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Artikel in diesem Heft
- Frontmatter
- Effect of Axial Velocity Density Ratio on the Performance of a Controlled Diffusion Airfoil Compressor Cascade
- Uncertainty Analysis in Fatigue Life Prediction of Gas Turbine Blades Using Bayesian Inference
- A New Turbo-shaft Engine Control Law during Variable Rotor Speed Transient Process
- Numerical Study of a Fuel Centrifugal Pump with Variable Impeller Width for Aero-engines
- Analysis of Ablative Performance of C/C Composite Throat Containing Defects Based on X-ray 3D Reconstruction in a Solid Rocket Motor
- Effects of Circumferential Casing Grooves on the Performance of a Transonic Axial Compressor
Artikel in diesem Heft
- Frontmatter
- Effect of Axial Velocity Density Ratio on the Performance of a Controlled Diffusion Airfoil Compressor Cascade
- Uncertainty Analysis in Fatigue Life Prediction of Gas Turbine Blades Using Bayesian Inference
- A New Turbo-shaft Engine Control Law during Variable Rotor Speed Transient Process
- Numerical Study of a Fuel Centrifugal Pump with Variable Impeller Width for Aero-engines
- Analysis of Ablative Performance of C/C Composite Throat Containing Defects Based on X-ray 3D Reconstruction in a Solid Rocket Motor
- Effects of Circumferential Casing Grooves on the Performance of a Transonic Axial Compressor
