Hongtao Zheng
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View article: Study on the Flame Transition Characteristics of a Gas Turbine Combustor
Study on the Flame Transition Characteristics of a Gas Turbine Combustor Open
Gas turbines are widely used as important equipment for electricity generation on islands and offshore platforms. During the operation of a gas turbine, the flame shape in the combustion chamber undergoes variations in response to changes …
View article: Impact of Oxygen Content on Flame Dynamics in a Non-Premixed Gas Turbine Model Combustor
Impact of Oxygen Content on Flame Dynamics in a Non-Premixed Gas Turbine Model Combustor Open
In this study, large eddy simulation (LES) was used to investigate the dynamic characteristics of diffusion flames in a swirl combustion chamber at an oxygen content of 11–23 wt% and temperature of 770 K. The proper orthogonal decompositio…
View article: Exploring Vortex–Flame Interactions and Combustion Dynamics in Bluff Body-Stabilized Diffusion Flames: Effects of Incoming Flow Velocity and Oxygen Content
Exploring Vortex–Flame Interactions and Combustion Dynamics in Bluff Body-Stabilized Diffusion Flames: Effects of Incoming Flow Velocity and Oxygen Content Open
An afterburner encounters two primary features: high incoming flow velocity and low oxygen concentration in the incoming airflow, which pose substantial challenges and contribute significantly to the deterioration of combustion performance…
View article: Theoretical Analysis on Thermodynamic and Economic Performance Improvement in a Supercritical CO<sub>2</sub> Cycle by Integrating with Two Novel Double‐Effect Absorption Reheat Power Cycles
Theoretical Analysis on Thermodynamic and Economic Performance Improvement in a Supercritical CO<sub>2</sub> Cycle by Integrating with Two Novel Double‐Effect Absorption Reheat Power Cycles Open
To enhance the overall performance of recompression supercritical carbon dioxide‐ (sCO 2 ‐) based systems, two new double‐effect absorption reheat power cycles (DARPC) were developed in this study. These methods are based on the typical ab…
View article: Numerical Simulation Study on the Dynamics of Bluff-Body Flames under Oxygen-Lean Conditions
Numerical Simulation Study on the Dynamics of Bluff-Body Flames under Oxygen-Lean Conditions Open
As modern aeroengine combustors advance towards high temperatures, afterburners are inevitably affected by diminished oxygen content in incoming flows, thus affecting combustion efficiency, instability, and flammability limits. In this stu…
View article: Erratum: “Numerical investigations on the deformation and breakup of an n-decane droplet induced by a shock wave” [Phys. Fluids <b>34</b>, 063306 (2022)]
Erratum: “Numerical investigations on the deformation and breakup of an n-decane droplet induced by a shock wave” [Phys. Fluids <b>34</b>, 063306 (2022)] Open
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View article: Rotating detonation combustion with in-situ evaporating bi-disperse n-heptane sprays
Rotating detonation combustion with in-situ evaporating bi-disperse n-heptane sprays Open
Eulerian-Lagrangian simulations are conducted for two-dimensional Rotating Detonative Combustion (RDC) fueled by bi-disperse n-heptane sprays without any fuel pre-vaporization. Parametric studies are performed to study the influences of dr…
View article: Eulerian-Lagrangian modelling of rotating detonative combustion in partially pre-vaporized n-heptane sprays with hydrogen addition
Eulerian-Lagrangian modelling of rotating detonative combustion in partially pre-vaporized n-heptane sprays with hydrogen addition Open
Rotating detonation combustion (RDC) fuelled with partially pre-vaporized n-heptane sprays and gaseous hydrogen is studied with an Eulerian-Lagrangian method. Our focus is the effects of pre-vaporized n-heptane equivalence ratios and dropl…
View article: Investigations on the influence of one and two-sided jet deflector on acoustic environment of multi-nozzle launch vehicle at lift-off
Investigations on the influence of one and two-sided jet deflector on acoustic environment of multi-nozzle launch vehicle at lift-off Open
To study the acoustic environment of multi-jet impinging the jet deflector when the launch vehicle takes off, a compressible flow model of gas-air is established. The turbulence equation of scale-adaptive simulation (SAS) and the acoustic …
View article: Numerical Investigation of Mixing Characteristic for CH4/Air in Rotating Detonation Combustor
Numerical Investigation of Mixing Characteristic for CH4/Air in Rotating Detonation Combustor Open
The mixing process of fuel and oxidizer is a very critical factor affecting the real operating performance of non-premixed rotating detonation combustor. In this paper, a two-dimensional numerical study is carried out to investigate the fl…
View article: Numerical Simulation of Hot Jet Detonation with Different Ignition Positions
Numerical Simulation of Hot Jet Detonation with Different Ignition Positions Open
Ignition position is an important factor affecting flame propagation and deflagration-to-detonation transition (DDT). In this study, 2D reactive Navier–Stokes numerical studies have been performed to investigate the effects of ignition pos…
View article: Effects of Diverging Nozzle Downstream on Flow Field Parameters of Rotating Detonation Combustor
Effects of Diverging Nozzle Downstream on Flow Field Parameters of Rotating Detonation Combustor Open
In this study, three-dimensional numerical studies have been performed to investigate the performance of a rotating detonation combustor with a diverging nozzle downstream. The effects of a diverging nozzle on the formation and propagation…
View article: Experimental and Numerical Investigations of Plasma Ignition Characteristics in Gas Turbine Combustors
Experimental and Numerical Investigations of Plasma Ignition Characteristics in Gas Turbine Combustors Open
Reliable ignition is critical for improving the operating performance of modern combustor and gas turbines. As an alternative to the traditional spark discharge ignition, plasma assisted ignition has attracted more interest and been shown …
View article: Investigation of the Pressure Gain Characteristics and Cycle Performance in Gas Turbines Based on Interstage Bleeding Rotating Detonation Combustion
Investigation of the Pressure Gain Characteristics and Cycle Performance in Gas Turbines Based on Interstage Bleeding Rotating Detonation Combustion Open
To further improve the cycle performance of gas turbines, a gas turbine cycle model based on interstage bleeding rotating detonation combustion was established using methane as fuel. Combined with a series of two-dimensional numerical simu…
View article: A Thermodynamic Analysis of the Pressure Gain of Continuously Rotating Detonation Combustor for Gas Turbine
A Thermodynamic Analysis of the Pressure Gain of Continuously Rotating Detonation Combustor for Gas Turbine Open
Considering the potential applications of continuously rotating detonation (CRD) combustors in gas turbines, this paper performed a numerical investigation into the pressure gain performance of CRD combustors, using methane–air as a reacti…
View article: Pressure Gain Characteristic of Continuously Rotating Detonation Combustion and its Influence on Gas Turbine Cycle Performance
Pressure Gain Characteristic of Continuously Rotating Detonation Combustion and its Influence on Gas Turbine Cycle Performance Open
Considering the pressure gain characteristic of continuously rotating detonation (CRD) combustion, a rotating detonation gas turbine cycle was established using methane as fuel. The variation of pressure gain characteristic and its influen…
View article: Navier-Stokes equations in the half-space in variable exponent spaces of Clifford-valued functions
Navier-Stokes equations in the half-space in variable exponent spaces of Clifford-valued functions Open
In this article, we study the steady generalized Navier-Stokes equations in a half-space in the setting of variable exponent spaces. We first establish variable exponent spaces of Clifford-valued functions in a half-space. Then, using this…