A5087652869- Turbomachinery Performance and Optimization
- Heat Transfer Mechanisms
- Combustion and flame dynamics
- Fluid Dynamics and Turbulent Flows
- Luminescence and Fluorescent Materials
- Luminescence Properties of Advanced Materials
- Computational Fluid Dynamics and Aerodynamics
- Perovskite Materials and Applications
- Adaptive Control of Nonlinear Systems
- Atmospheric chemistry and aerosols
- Advanced Combustion Engine Technologies
- Refrigeration and Air Conditioning Technologies
- Global trade and economics
- Rocket and propulsion systems research
- Combustion and Detonation Processes
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Solid State Laser Technologies
- Advanced Algorithms and Applications
- Cyclone Separators and Fluid Dynamics
- Energetic Materials and Combustion
- Glass properties and applications
- Granular flow and fluidized beds
- Fire dynamics and safety research
- Thermochemical Biomass Conversion Processes
Air Force Engineering University
2020-2024
Huaibei Normal University
2024
Xi'an Jiaotong University
2015-2024
South China University of Technology
2023-2024
State Key Laboratory of Luminescent Materials and Devices
2023-2024
Smile Train
2023
Aerospace Institute (Germany)
2019
A deep-red to NIR ML phosphor of MgGeO 3 : Mn 2+ is reported, and defect believed influence the properties by comparing phosphor’s luminescent before after 4+ –Mn self-reduction.
Mechanoluminescence (ML) is the nonthermal luminescence generated in process of force-to-light conversion, which has broad prospects stress sensing, wearable devices, biomechanics, and multiple information anticounterfeiting. Multivalence emitter ions utilize their own self-reduction to realize multiband ML without introducing another dopant, such as Eu3+/Eu2+, Sm3+/Sm2+, Mn4+/Mn2+. However, self-reduction-induced bismuth-activated materials rarely been reported so far. In this work, a novel...
Abstract Multi‐mode mechanoluminescence (ML) materials are have applications such as anti‐counterfeiting, stress sensing, and information security. There is limited general consensuses on the luminescent mechanisms, even though exploring ML mechanism based defects has shown significance in further studies both design application. Here, a deep‐red to near‐infrared (NIR) material reported Mn 2+ ‐activated double perovskite‐type compound (CaZnGe 2 O 6 : ). The abundant lattice sites within...
The effects of the hot streak and airfoil clocking on heat transfer aerodynamic characteristics in a high pressure (HP) gas turbine have been investigated this paper. blade geometry is taken from first 1.5 stage GE-E3 engine. To study effect clocking, three cases under nonuniform uniform inlet temperature boundary conditions were simulated first. Subsequently, four positions (CPs) S2 (second stator) arranged these to combined clocking. By solving unsteady compressible Reynolds-averaged...
An unsteady computational study was carried out on GE-E3 high pressure (HP) turbine at inflow turbulence intensities of 5%, 10%, and 20% accompanying with inlet hot streak (HS) two circumferential positions (impinging nonimpinging relative to vane leading edge) analyze the interacted HS influences. Turbulence decay mechanisms in passage were presented, airfoil heat transfer behaviors explored by means adiabatic wall temperature, coefficient (HTC), flux. The results indicate that elevated...
In this paper, based on the grid node coordinates variation and Jacobian Matrices, turbulent continuous adjoint method with linearized turbulence model is studied developed to fully account for of eddy viscosity. The corresponding equations, boundary conditions final sensitivities are formulated a general expression. To implement optimization transition flow, flow solver combining employed, an framework SST frozen Gamma-Theta established. order choose appropriate objective optimization, four...
This paper presents an investigation on the hot streak migration across tip clearance and heat transfer blade in a high pressure (HP) gas turbine with different inlet swirl directions clocking positions. The geometry is taken from first stage of GE-E3 engine. Two (positive negative) two circumferential positions (aligning S1 nozzle leading edge mid passage) for have been employed investigated, respectively. cases only at are adopted as baseline this study. By solving unsteady compressible...
Abstract The rotating detonation turbine engine is a research hotspot in recent years, but the mainly at phase of theoretical analysis. In this paper, influence circumferentially pulsating flow field on performance studied by numerical simulation. results show that uneven inlet will increase working load stator vane, produce greater loss. At same time, strength channel vortex and tip leakage inside rotor also increasing. mass rate work efficiency decrease with unevenness field.
In this paper, unsteady RANS simulations were performed at two hot streak (HS) circumferential positions with inlet turbulence intensity of 5% and 20%. The interacted HS high mainstream effects on endwall heat transfer characteristics a high-pressure (HP) turbine discussed by analyzing the flow structures presenting adiabatic wall temperature, coefficient (HTC) flux distributions. results indicate that both temperature HTC increase most stator regions. addition, plays greater role than...
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High pressure (HP) turbine works under nonuniform inlet conditions produced mainly by modern lean burn combustors. This article employed the conjugate heat transfer method to investigate influences of inflow and film hole arrangements on coolant coverage characteristics. The researched region is side (PS) nozzle guiding vane (NGV). A scaled-up model GE-E3 engine HP stator was used cooling performances four different arrangement schemes PS were discussed. In addition, results conditions,...
Research on multicomponent interactions in aero-engine design technology has gained significant attention. The presence of hot streak (HS) at the combustor exit is critical, as it affects turbine aerodynamic performance and heat transfer properties blades. This paper presents a HS simulator for 1.5-stage rig, examining transportation attenuation mechanisms two circumferential clocking positions temperature ratios. Numerical simulations were conducted using commonly employed two-equation...
An unsteady computational study were carried out for the GE-E3 HP turbine at inflow turbulence intensities of 5%, 10% and 20% accompanying with inlet hot streak (HS) two circumferential positions (impinging non-impinging relative to vane leading edge) analyze interacted HS influences. Several validation studies performed investigate heat transfer prediction ability shear stress transport (SST) model coupled γ-θ transition model. Turbulence decay mechanisms in passage presented, airfoil...
Abstract Demands are increasing for ultrashort pulse laser in industrial applications, where the gain bandwidth of most optical fiber material is not wide enough, and developing a medium challenging. Glass–ceramic fibers containing Nd 3+ /Yb co‐doped YCa 4 O(BO 3 ) nanocrystals were fabricated by molten core method successive heat treatment. After careful treatment, precipitated core. Enhanced broadband near‐infrared (NIR) emission from 850 to 1150 nm (bandwidth: ∼252 nm) was obtained...
In liquid rocket engine, turbines are used to drive the pumps that deliver fuel and oxygen with high-pressure into combustion chamber.The turbine performance affects engine specific impulse, thrust-to-weight ratio, reliability in a propulsion system.To improve efficiency is of great significance for enhancing engine.In this paper, steady unsteady aerodynamic characteristics were investigated firstly an original transonic large thrust taking consideration upstream admission chamber, shroud...
Abstract Under the effect of inlet distortion profiles (including hot-streaks, total pressure profiles, and swirling flow angle patterns), film cooling performance on leading edge (LE) region GE-E3 nozzle guide vanes (NGVs) has been numerically investigated in this paper. Firstly, complicated a low NOx combustor chamber decoupled to single factors explore individual coupling effects NGV LE (Case 1 Case 4). Then original three modified film-hole configurations are compared discussed under...