A5005166860- Fluid Dynamics and Turbulent Flows
- Turbomachinery Performance and Optimization
- Heat Transfer Mechanisms
- Computational Fluid Dynamics and Aerodynamics
- Combustion and flame dynamics
- Oil Spill Detection and Mitigation
- Fluid Dynamics and Vibration Analysis
- Coastal and Marine Dynamics
- Wind and Air Flow Studies
- Aerodynamics and Fluid Dynamics Research
- Rocket and propulsion systems research
- Tribology and Lubrication Engineering
- Fluid Dynamics Simulations and Interactions
- Soil Mechanics and Vehicle Dynamics
- Advanced Combustion Engine Technologies
- Fluid Dynamics and Heat Transfer
- Plasma and Flow Control in Aerodynamics
- Refrigeration and Air Conditioning Technologies
- Earthquake and Tsunami Effects
- Medical Image Segmentation Techniques
- Aerodynamics and Acoustics in Jet Flows
- Particle Dynamics in Fluid Flows
- Underwater Vehicles and Communication Systems
- Wave and Wind Energy Systems
- Advanced Vision and Imaging
Shanghai Jiao Tong University
2022-2025
Shanghai Sixth People's Hospital
2025
Beihang University
2012-2024
Air Force Engineering University
2009-2024
Nanjing Institute of Technology
2024
Tianjin Research Institute of Water Transport Engineering
2011-2022
Dalian University
2022
Dalian University of Technology
2022
Xi'an University of Technology
2022
University of Surrey
2016-2021
A general methodology is developed for simulating complicated reacting flow problems. This method combines the large-eddy simulation (LES) technique with existing probability density function (PDF) approach turbulent flows and provides a closed form representation all terms that are involved in simulations. Some other issues related to this problem also discussed.
The increase of the thrust/weight ratio aircraft engines is extremely restricted by different 3-D flow loss mechanisms. One them corner separation that can form at junction between a blade suction side and hub or shroud. In this paper, in order to further investigate turbulent characteristics separation, large-eddy simulation (LES) conducted on compressor cascade configuration using NACA65 profiles (chord based Reynolds number: 3.82 × 105), comparison with previous obtained experimental...
A vision system was designed to detect multiple lanes on structured highway using an "estimate and detect" scheme. It detected the lane in which vehicle driving (the central lane) estimated possible position of two adjacent lanes. Then detection made based these estimations. The first recognized if it a straight road or curve its GPS OpenStreetMap digital map. cases were processed differently. For road, original image Hough transformation simplified perspective make In case path, complete...
While turbine rim sealing flows are an important aspect of turbomachinery design, affecting aerodynamic performance and disk temperatures, the present understanding predictive capability for such is limited. The aim study to clarify flow physics involved in provide high-quality experimental data use evaluation computational fluid dynamics (CFD) models. seal considered similar a chute previously investigated by other workers, focuses on inherent unsteadiness flows, rather than imposed...
This paper presents a review of research on turbine rim sealing with emphasis placed the underlying flow physics and modelling capability. Rim seal flows play crucial role in controlling engine disc temperatures but represent loss from main power cycle are associated spoiling losses turbine. Elementary models that rely empirical validation currently used design do not account for some known mechanisms, prediction performance computational fluid dynamics has proved challenging. Computational...
Obstructive sleep apnea (OSA) is associated with cognitive impairment. The effects of continuous positive airway pressure (CPAP) on neuroimaging biomarkers and performance among middle-aged patients OSA normal cognition remain unclear. To investigate the CPAP therapy over 12 months performance. In this multicenter, randomized clinical trial, we randomly assigned 148 participants an apnea-hypopnea index ≥15/hour into two groups: receiving best supportive care (BSC); BSC alone. primary...
Unsteady flow modes with intrinsic frequencies unrelated to that of the turbine blades are found be dominated by inertial waves. In presence these waves, rim sealing is less efficient, and conventional Reynolds-averaged Navier-Stokes methods fail predict effectiveness. The radial seal, which limits motion and, in turn, circumferential Coriolis force, can suppress waves (unsteady modes).
The probability density function (pdf) of a passive scalar in homogeneous turbulence is studied using the mapping closure model recently developed by Kraichnan and co-workers. An analytical solution for equation derived. This preserves boundedness fields yields pdf’s that relax to Gaussian distributions, agreement with experiments numerical simulations.
In order to gain a better knowledge of the mechanisms and calibrate computational fluid dynamics (CFD) tools including both Reynolds-averaged Navier-Stokes (RANS) large eddy simulation (LES), detailed accurate experimental study corner stall in linear compressor cascade has been carried out. Data are taken at Reynolds number 382 000 based on blade chord inlet velocity. At first, flow boundary layer is surveyed using hot-wire anemometry. Then investigate effects incidence, measurements...
Abstract Improved understanding of the character an uncontrolled pipeline flow is critical for estimation oil discharge and droplet size distribution both essential evaluating spill impact. Measured gas properties at wellhead Macondo255 detailed numerical modeling suggested that within pipe could have been “churn,” whereby tumble violently different from bubbly commonly assumed release. The churn would produced 5 times energy loss in compared to flow, its plume entrained 35% more water than...
This paper addresses limitations of widely used Reynolds-averaged turbulence models (RANS) for prediction gas turbine internal air systems. Results from direct numerical simulation (DNS), wall-resolved large-eddy (LES), wall-modelled (WMLES), and RANS benchmark test cases are compared. For rotor-stator disc cavity flows results mean velocities, velocity fluctuations, rotor torque laminar-turbulent transition considered compared with published data. cavities between co-rotating discs...
Abstract This paper describes the extension of Cartesian cut cell method to applications involving unsteady incompressible viscous fluid flow. The underlying scheme is based on solution full Navier–Stokes equations for a variable density system using artificial compressibility technique together with Jameson‐type dual time iteration. computational domain encompasses two regions and interface between them treated as contact discontinuity in field, thereby eliminating need special free surface...