- Design of High Performance Pump Stage
- Design Optimisation of a Strongly Interacting Diffuser Pump Stage
- Design of a Double-Suction Volute Pump
- Multi-Objective Optimisation of a Centrifugal Pump Stage by Means of Design of Experiment Coupled with Inverse Design Method
- Design of a 3 Stage Axial LP Turbine for Aeroengine Applications
- Design High Performance Centrifugal Compressor Vaned Diffusers
- Design High Performance Axial Turbine Stages with More Uniform Exit Flow
- Design of an Automobile Torque Converter
- Design of a Cooling Fan
- Design of a Double-Suction Fan Stage
- Redesign of an Industrial Compressor Stage
- Design of Refrigeration Compressor Stage in R134a
- Hydraulic Design Optimisation of a Torque Converter
- Design High Efficiency Impellers with Splitter Blades
- Design High Performance Centrifugal Compressor Impellers
- Study of Turbopump Inducers Designed by 3-D Inverse Design Method
- Design Optimisation of Cryogenic Pump Inducer
- Development of Cryogenic Pump Hydrodynamics Using Inverse Design Method and CFD
- Improvements of Inducer Inlet Backflow Characteristics Using 3-D Inverse Design Method
- Effects of Blade Loading on Pump Inducer Performance and Flow Fields
- Design of a Second Stage Hydrogen Rocket Turbopump by TURBOdesign1
- Application of TURBOdesign1 for the Compact Design of Rocket Engine Turbopump - JAXA
- Design of Mixed Flow Pump Stage Using TURBOdesign1 and CFD Code, Hyosung
- 3D Inverse Method Improves Pump Design, Carver Pump cuts design times and increases product line growth
- Development of New Vertical Line Shaft Pumps
Design of an Inducer Pump with High Suction Performance and Backflow Control
The design of inducers is critical to achieving high suction performance in industrial pumps and rocket engine turbopumps. However, the conventional design approach, based on blade angles, often causes unstable pump operation. Instabilities such as strong inlet backflow and rotating cavitation in inducers may cause mechanical failures in pumps and the entire pumping system.
TURBOdesign1 has been successfully applied to the design of inducers and validated by experiments. By optimizing blade loading, the suction performance can be improved over the operating range. The low pressure area was reduced as shown in Figures1 and 2.
It was also confirmed that the inlet backflow can be controlled by optimizing the blade loading at the leading edge.
TURBOdesign1 was also applied in the design of the main impeller of an inducer pump, see Figure 3.
Experimental validation confirmed that employing aft-loading at the shroud was effective in achieving high suction performance. In addition, consideration of the pre-swirl created by the inducer is important in improving the suction performance of the main impeller. See Figure 4.
The design of a highly loaded, rocket engine, turbo pump inducer, was carried out using TURBOdesign1 (Figure 5). The conventional helical type inducer has a strong inlet backflow even at the design point, the presence of which is confirmed by the photograph in Figure 6. This inlet backflow at the design point was eliminated by optimizing the blade loading distribution using TURBOdesign1, see Figure 7. The meridional geometry was also re-designed to achieve high loading. Figures 8 and 10 show the streamlines at design point, the elimination of the inlet backflow can be clearly seen.
The elimination of inlet backflow is important for assuring mechanical reliability, and avoiding deterioration of the “thermodynamic effects” on suppressing cavitation of liquid hydrogen. Figures 9 and 11 show the FFT analysis results of measured pressure fluctuation at the design point, and a cavitation number of σ = 0.04. In the case of the inducer designed by TURBOdesign1, pressure oscillation was maintained at a very low level and no evidence of rotating cavitation was observed.