Yongbao Liu
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View article: Coordinated Control Strategy for Island Power Generation System with Photovoltaic, Hydrogen-Fueled Gas Turbine and Hybrid Energy Storage
Coordinated Control Strategy for Island Power Generation System with Photovoltaic, Hydrogen-Fueled Gas Turbine and Hybrid Energy Storage Open
Marine and island power systems usually incorporate various forms of energy supply, which poses challenges to the coordinated control of the system under diverse, irregular, and complex load operation modes. To improve the stability and se…
View article: Study on a Fault Diagnosis Method for Heterogeneous Chiller Units Based on Transfer Learning
Study on a Fault Diagnosis Method for Heterogeneous Chiller Units Based on Transfer Learning Open
As the core refrigeration equipment in cooling systems, the operational state of chiller units is crucial for ship support, equipment cooling, and mission stability. However, because of their sensitivity and the complexity of operating env…
View article: A Comprehensive Nonlinear Multiaxial Life Prediction Model
A Comprehensive Nonlinear Multiaxial Life Prediction Model Open
Compressor blades are subjected to multiaxial loads during operation. Using uniaxial life prediction formulas to predict their fatigue life can result in significant errors. Therefore, by analyzing the loading conditions of the blades, a f…
View article: Influence of Thermal Inertia on Dynamic Characteristics of Gas Turbine Impeller Components
Influence of Thermal Inertia on Dynamic Characteristics of Gas Turbine Impeller Components Open
Gas turbines in land-based microgrids and shipboard-isolated power grids frequently face operational challenges, such as the startup and shutdown of high-power equipment and sudden load fluctuations, which significantly impact their perfor…
View article: Research on an Ice-Breaking Mechanism Using Subglacial Resonance
Research on an Ice-Breaking Mechanism Using Subglacial Resonance Open
The Arctic ice layer serves as an excellent cover for strategic nuclear submarine forces, but it also poses significant challenges when submarines surface. This paper proposes a method for breaking through the ice layer and surfacing in po…
View article: Review of Turbine Film Cooling Technology for Marine Gas Turbines
Review of Turbine Film Cooling Technology for Marine Gas Turbines Open
Film cooling can continuously cover a layer of low-temperature gas film on the surface of hot-end components, thereby achieving the effect of isolating high-temperature gas, and can achieve a temperature drop of 600 K. As an advanced and e…
View article: Transient Power Stabilization in Marine Microgrids: Improved Droop Control and Feedforward Strategies for Heterogeneous Gas Turbines with Hybrid Energy Storage
Transient Power Stabilization in Marine Microgrids: Improved Droop Control and Feedforward Strategies for Heterogeneous Gas Turbines with Hybrid Energy Storage Open
To address the complexity of power allocation in parallel operation systems combining single-shaft and split-shaft gas turbine generators, this paper proposes a coordinated power allocation strategy based on enhanced voltage droop control …
View article: A Study of a Nonsmooth Fuzzy Active Disturbance Rejection Control Algorithm for Gas Turbines in Maritime Autonomous Surface Ship
A Study of a Nonsmooth Fuzzy Active Disturbance Rejection Control Algorithm for Gas Turbines in Maritime Autonomous Surface Ship Open
To address the dynamic and robust performance limitations of gas turbines in maritime autonomous surface ship applications, this paper proposes a novel nonsmooth fuzzy active disturbance rejection control (NS_FADRC) algorithm. This method …
View article: Comparing Different Contrast Injection Methods for Multislice Spiral CT Imaging in Triple-Rule-Out Examinations: A Study on Acute Chest Pain Patients
Comparing Different Contrast Injection Methods for Multislice Spiral CT Imaging in Triple-Rule-Out Examinations: A Study on Acute Chest Pain Patients Open
The combination of the modified CM injection method and FLASH scanning mode reduces the required CM volume by nearly 30 mL and significantly decreases radiation dose exposure during the examination. This approach shows valuable potential f…
View article: Cooperative and Hierarchical Optimization Design of Shipboard MVDC System for Adapting to Large, Pulsed Power Load
Cooperative and Hierarchical Optimization Design of Shipboard MVDC System for Adapting to Large, Pulsed Power Load Open
Supplying power to large, pulsed power loads in shipboard medium voltage direct current integrated power systems is challenging due to the limited dynamic power responsiveness of the gas turbine. The two main solutions to this problem are …
View article: Fault diagnosis of rotating parts integrating transfer learning and ConvNeXt model
Fault diagnosis of rotating parts integrating transfer learning and ConvNeXt model Open
This paper proposes a fault diagnosis method for rotating machinery that integrates transfer learning with the ConvNeXt model (TL-CoCNN), addressing challenges such as small sample sizes and varying operating conditions. To meet the input …
View article: Research on state machine control optimization of double-stack fuel cell/super capacitor hybrid system
Research on state machine control optimization of double-stack fuel cell/super capacitor hybrid system Open
To ensure the continuous high-efficiency operation of fuel cell systems, it is essential to perform real-time estimation of the maximum efficiency point and maximum power point for multi-stack fuel cell systems. The region between these tw…
View article: An Innovative Online Adaptive High-Efficiency Controller for Micro Gas Turbine: Design and Simulation Validation
An Innovative Online Adaptive High-Efficiency Controller for Micro Gas Turbine: Design and Simulation Validation Open
In this article, an innovative online adaptive high-efficiency control strategy is proposed to improve the power generation efficiency of a marine micro gas turbine under partial load. Firstly, a mathematical model of the micro-gas turbine…
View article: Parametric Analysis and Improvement of the Johnson-Cook Model for a TC4 Titanium Alloy
Parametric Analysis and Improvement of the Johnson-Cook Model for a TC4 Titanium Alloy Open
Titanium alloys are widely used in the manufacture of gas turbines’ compressor blades. Elucidating their mechanical behavior and strength under damaged conditions is the key to evaluating the equipment’s reliability. However, the conventio…
View article: The experimental research of which different types of impact signals affect the bifurcation chaos behavior of three-degree-of-freedom collision system
The experimental research of which different types of impact signals affect the bifurcation chaos behavior of three-degree-of-freedom collision system Open
Collision is a faulty behavior in mechanical equipment, which greatly affects the safety of equipment. In this paper, aiming at the collision failures that are prone to occur in mechanical equipment, the nonlinear fault collision behavior …
View article: Numerical Simulation and Experimental Study on Dynamic Characteristics of Gas Turbine Rotor System Subjected to Ship Hull Excitation
Numerical Simulation and Experimental Study on Dynamic Characteristics of Gas Turbine Rotor System Subjected to Ship Hull Excitation Open
To address the challenge of measuring the dynamic characteristic parameters of the gas turbine rotor system affected by hull excitation, a vibration transmission model integrating a ship model slice, test data, and a three-dimensional enti…
View article: Effectiveness and energy loss of film cooling in endwall with spiral-channel holes
Effectiveness and energy loss of film cooling in endwall with spiral-channel holes Open
Spiral-channel holes are utilized on the turbine endwall to enhance cooling effectiveness. Numerical simulations and experimental verification are conducted to analyze the cooling performance and energy loss of spiral-channel holes, as wel…
View article: Investigation on the Influence of Thermal Inertia on the Dynamic Characteristics of a Gas Turbine
Investigation on the Influence of Thermal Inertia on the Dynamic Characteristics of a Gas Turbine Open
In mini-grids and marine-isolated grids, power generation gas turbines are subjected to rapid start-up, shutdown, and acceleration/deceleration. This sudden load change can pose a significant impact on the power grid, severely affecting th…
View article: Optimal transient power sharing method for shipboard MVDC System based on segmented variable step dynamic programming
Optimal transient power sharing method for shipboard MVDC System based on segmented variable step dynamic programming Open
Supplying power for large pulsed power load with shipboard medium voltage direct current integrated power system has continued to be a challenge. The energy storage device configured in the system can effectively mitigate the power impact …
View article: Application of NH3 Fuel in Power Equipment and Its Impact on NOx Emissions
Application of NH3 Fuel in Power Equipment and Its Impact on NOx Emissions Open
Due to high greenhouse gas emissions, countries worldwide are stepping up their emission reduction efforts, and the global demand for new, carbon-free fuels is growing. Ammonia (NH3) fuels are popular due to their high production volume, h…
View article: Influence of trapezoidal channel design on volume power density of ammonia-hydrogen fuel cells
Influence of trapezoidal channel design on volume power density of ammonia-hydrogen fuel cells Open
Proton exchange membrane fuel cells based on ammonia decomposition gas (ammonia-hydrogen fuel cells) contain about 25% nitrogen at the anode, resulting in lower power density. In this paper, the volume power density enhancement effect of t…
View article: Nonlinear Dynamic Analysis on Dual‐Rotor‐Bearing‐Casing System for Marine Gas Turbine
Nonlinear Dynamic Analysis on Dual‐Rotor‐Bearing‐Casing System for Marine Gas Turbine Open
Taking the marine gas turbine as a research background, a dual‐rotor‐bearing‐casing system model was established considering the bearing nonlinearities and unbalanced excitation. Based on Lagrange’s equation of motion and rotor dynamics th…
View article: The film cooling performance of spiral-channel holes on turbine guide vane
The film cooling performance of spiral-channel holes on turbine guide vane Open
A spiral-channel hole is implemented to heighten the cooling performance of turbine vanes by inducing swirling flow. Numerical simulations examine and compare the film effectiveness and flow structure at four positions. The impact of vario…
View article: Hierarchical control of hybrid energy storage system in shipboard gas turbine power system with multiple pulsed power loads
Hierarchical control of hybrid energy storage system in shipboard gas turbine power system with multiple pulsed power loads Open
Transient power fluctuations may occur in shipboard DC microgrids when switching a pulsed power load (PPL). However, shipboard power systems (SPSs) are isolated power grids with relatively low inertia and capacity, making them unable to re…
View article: Bio-inspired design of a fence-type triangular flow channel for ammonia-hydrogen fuel cells
Bio-inspired design of a fence-type triangular flow channel for ammonia-hydrogen fuel cells Open
Appropriate channel design can improve the volume utilization and power density of proton exchange membrane fuel cells with ammonia decomposition gas as fuel (Ammonia-Hydrogen fuel cell, AHFC), and accelerate its application in commercial …