A5005549563- Tribology and Lubrication Engineering
- Hydraulic and Pneumatic Systems
- Gear and Bearing Dynamics Analysis
- Lubricants and Their Additives
- Structural Load-Bearing Analysis
- Erosion and Abrasive Machining
- Aerodynamics and Fluid Dynamics Research
- Metal Forming Simulation Techniques
- Refrigeration and Air Conditioning Technologies
- Turbomachinery Performance and Optimization
- Mechanical Systems and Engineering
- Structural Analysis and Optimization
- Tribology and Wear Analysis
Northwestern Polytechnical University
2007-2022
Due to the design requirements for high power-to-weight ratios in modern aviation equipment, hydraulic servo valves are continuously developing towards miniaturization. Current manufacturing methods, such as casting and forging, constrain globe valve designs be tailored manufacturability. However, integrated flow passage structures produced using additive feature minimal external envelopes while exhibiting complexity. This results increased difficulty, necessitating research into their...
By applying a concept similar to ‘domain scaling’ treatment often used in multi-stage turbomachinery flow field the interface between rotor blade passage and end-wall treatments, series of computational studies were carried out understand physical mechanism responsible for improvement stall margin modern subsonic axial-flow compressor due axial-skewed slot casing treatment. Particular attention was given examining interaction tip slot. In order validate multi-block model applied region,...
In this paper, the transient lubrication characteristics of hydrodynamic journal bearings during external gear pump meshing cycle are studied. calculation part, a numerical model is developed to assess initial start-up an aero pump. The takes into account effects surface topography, asperities contact, and speed. simulation flow inside bearing load environment analyzed by computational fluid dynamics model. Then method presented solve problem pump-bearings system, considering pump’s...
This paper is proposed a bearing optimization design strategy based on CFD simulation and lubrication characteristics data. Firstly, the unstructured hexahedral grid of established ANSYS. Then, external load calculated in detail by method, flow field distribution under different structural parameters studied numerical simulation. Based data, carried out using genetic algorithm. The results show that eccentricity 0.82 width diameter ratio 1.19. Under this parameter, capacity 5300N, compared...
In this paper, a load coupling numerical method is developed to analyze the performance of journal bearing considering internal flow simulation inside aero-engine gear pump. First, three-dimensional analysis conducted. Then based on JFO theory, an improved hybrid scheme including switch function used solve Reynolds equation while external given by result The robust, convergence and validation algorithm tested compared with experiment where pressure maximum error less than 2%. Finally,...
Abstract In order to study the thermal lubrication characteristics of aero-gear pump journal bearing (APJB) under certain load and low medium viscosity, a APJB numerical model was established based on combination Reynolds adiabatic flow energy equations. The hydrodynamic temperature effects viscosity are considered finite difference method is adopted. results show that with increase width parameters, eccentricity decreases monotonically, minimum oil film thickness increases, friction...