A5102751054- Fluid Dynamics and Turbulent Flows
- Computational Fluid Dynamics and Aerodynamics
- Turbomachinery Performance and Optimization
- Combustion and flame dynamics
- Plasma and Flow Control in Aerodynamics
- Gas Dynamics and Kinetic Theory
- Analog and Mixed-Signal Circuit Design
- Advancements in PLL and VCO Technologies
- Radio Frequency Integrated Circuit Design
- Aerodynamics and Acoustics in Jet Flows
- Model Reduction and Neural Networks
- Radiative Heat Transfer Studies
- Lightning and Electromagnetic Phenomena
- Meteorological Phenomena and Simulations
- Power Transformer Diagnostics and Insulation
- Advanced Combustion Engine Technologies
- Real-time simulation and control systems
- High voltage insulation and dielectric phenomena
- Power Systems Fault Detection
Nanjing University of Aeronautics and Astronautics
2019-2024
Institute of Microelectronics
2014
Zhejiang University
2013
Electric Power University
2013
To conduct high-precision and high-resolution numerical simulation of complex flow structures in turbomachinery, a high-order finite volume weighted essentially non-oscillatory (WENO) scheme for the large eddy (LES) is improved embedded into three-dimensional viscous unsteady CFD solver NUAA-Turbo. Firstly, spectral characteristics convergence WENO are studied. Compared with classical scheme, has better dissipation dispersion faster speed. Then, coefficient CW Wall-Adapting Local...
A simple and perfectly current matched charge pump for ultra-low voltage applications in phase-locked loops is presented. The based on a gate switching architecture to ensure the output dynamic range. specially designed dual compensation circuits using high threshold transistors together with regular mismatch below 1.5% while keeping ranging from 0.02 0.76 V 40 nm CMOS Mixed-signal technology at 0.8 supply. And additional body bias circuit reduces negative impact process variation. proposed...
In order to understand the physical phenomenon of reflected shock/turbulent boundary layer interaction, Large Eddy Simulation (LES) is conducted investigate shock wave and turbulent interaction in a 12° compression ramp with inlet high Mach number 2.9. Rescaling/recycling method used as inflow turbulence generation technique validated on supersonic flat plate layer. The flow field recycling plane computation domain obtained give condition for LES computation. This paper focuses region, where...
As the core equipment of power generation system, a gas turbine is an indispensable energy-converting device in national industry. The flow inside high-pressure (HPT) highly unsteady, which has great influence on aerothermal performance and structural strength. To better clarify mechanism guide advanced design, basic characteristics transonic turbines are investigated paper by modified scale-adaptive simulation (SAS) model based shear stress transport (SST) turbulence model. numerical...
In numerical simulations, achieving high accuracy without significantly increasing computational costs is often challenging. To address this, this paper presents an improved finite volume weighted essentially non-oscillatory (WENO) scheme tailored for applicability in fluid dynamics (CFD) and implemented the flow solver NUAA-Turbo simulating turbomachinery flows using both RANS RANS/LES coupling. Firstly, new WENO validated against classic test cases to assess its stability reliability...
In numerical simulations, achieving high accuracy without significantly increasing computational cost is often a challenge. To address this issue, paper proposes an improved finite volume Weighted Essentially Non-Oscillatory (WENO) scheme for structured grids. By employing single-point quadrature rule to perform flux integration on the control faces, designed use in NUAA-Turbo three-dimensional fluid solvers based grids, utilizing RANS and RANS/LES coupling simulate turbomachinery flows....
To achieve high-fidelity large eddy simulation (LES) predictions of complex flows while keeping computational costs manageable, this study integrates a high-order WENO-ZQ scheme into the LES framework. The has been extensively studied for its accuracy, robustness, and cost in inviscid flow applications. This extended to viscous by integrating it three-dimensional structured grid CFD solver. High-fidelity simulations turbulent boundary layer supersonic compression ramp were conducted, with...
A large eddy simulation (LES) is conducted to investigate shock wave/turbulent boundary layer interaction in a 24° compression ramp at high inlet Mach number of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="m1"><mml:mrow><mml:mi>M</mml:mi><mml:mi>a</mml:mi><mml:mo>=</mml:mo><mml:mn>2.9</mml:mn></mml:mrow></mml:math> . The recycling/rescaling Method used as the inflow turbulence generation technique. wave structure and flow region are studied by visualization methods, such...
A novel switched-loop filter, which can significantly reduce ripples on voltage controlled oscillator (VCO) control line, is proposed for phase-locked loops (PLL) with an automatic frequency calibration technique. Complementary bootstrapped transmission gates are utilized and rearranged clocks generated to improve the performance of loop filter. Based SMIC 65 nm RF CMOS process, filter applicable 0.8 V 6 GHz PLL technique designed. Transistor level simulation results in SPECTRE show that...
Abstract The flow inside a high-pressure turbine is fully 3-D, unsteady flow, which has great influence on the aero-thermal performance and structural strength of turbines. In order to better understand mechanism guide design modern aero engines, basic characteristics transonic are investigated in present study. A modified scale-adaptive simulation (SAS) technique based shear stress transport (SST) turbulence model applied here. Two test cases carried out assess capability current predicting...