Shu Ying Li

Study on flow parameters optimisation for marine gas turbine intercooler system based on simulation experiment

The thermodynamic calculation software of Intercooled-Cycle gas turbine was developed to observe the impacts that the environmental parameters and cold degrees of intercooler produce quantitatively on this marine engine performance. And then, the mathematical model of intercooled-cycle gas turbine was established and the relative non-linear simulation model was also built based on MATLAB/SIMULINK to further study on flow parameters optimisation for marine gas turbine intercooler. At last, under a given structure size of intercooler, the impact of different liquid-side flow parameters on the intercooler system performance was analysed based on simulation model. The simulation experimental results show that the increase in glycol-water solution flow rate and seawater flow rate can improve the performance of the intercooled-cycle gas turbine to a degree, but the rational flow rates should be chosen according to the atmospheric condition and seawater temperature, and the optimal regulation rule was got.

Compressor Performance Curve Extrapolation Method Based on the Similarity Theory

Due to the fact that the low speed pump similarity theory is only applicable to incompressible fluid, this theory cannot be used for extrapolation of compressor performance curve. Considering the compressibility of working medium; therefore, this paper has modified the similarity theory and put forward a new index relationship equation. The two low speed performance lines which are already known were used to get the similar working points and extrapolate the performance lines through the optimization method. Compared with the existing performance lines, the results show that the method is simple, convenient and qualified with practicability and accuracy. This method plays an important role on studying startup process of a gas turbine and improving the accuracy of the simulation of startup process.

Summarize of Technological Development about Integrated Simulation of Gas Turbine Equipment

This paper summarizes integrated simulation technology development status of gas turbine equipment at home and abroad, makes comparative analysis of the deficiencies in the existing domestic research, forecasts the direction of development in the field of integrated simulation about gas turbine equipment at our country finally.

A Study on Semi-Physical Simulation for Marine Gas Turbine Generator Set Based on Hardware Agent

The simulation research on gas turbine generator set has the important practical significance for its main development direction in marine power plant. The research object is semi-physical simulation for marine gas turbine generator set. This paper presents a new type of semi-physical simulation scheme based on “hardware agent” through reviewing the existing the structure characteristics and deficiency of semi-physical simulation system of gas turbine device. The theoretical basis and operation control strategy and framework of the new project were discussed. The experiments on sudden load-up and load rejection were made based on new type of semi-physical simulation system for marine gas turbine set and had a good test effect.

Simulation Research on a Subsonic Flow around Plane Cascade

The paper deals with an analysis of a gas flow through two sets of plane cascade at various angles of attack (0 o, +20 o, -20 o) of different inlet Mach numbers (0.6,0.4, 0.2) by commercial CFD code FLUENT 6.3. Plane cascade aerodynamic research was performed with k-ε model and its flow characteristic was obtained. Its boundary separation and wake were observed. Then their influence factor and development characteristic were studied. Meanwhile, two sets of plane cascade are compared and their aerodynamic characteristics are analyzed.

The Application of Flywheel Energy Storage Device in Marine Gas Turbine Generator Set

Marine gas turbine generator set; Flywheel energy; Stability Abstract. Based on modular modeling idea, the modular model of marine generation system was set by the technology of systematic simulation. One set of simulation models of marine gas turbine generation system was generated. Results show that flywheel energy storage device can enhance the stability of power grid and play a better role in making marine gas turbine generation system stable under heavy load fluctuations.

A Fuzzy Logic Controller Application for Marine Power Plant

In order to ensure the quality of marine gas turbine generation set, its speed must maintain constant. Due to rising or falling power demand, the real and reactive power balance is harmed and hence the turbine output speed gets deviated from nominal value. This necessitates the need for an intelligent fuzzy controller to generate and deliver power in an interconnected system as economically and reliably as possible while maintaining the power turbine speed within permissible limits. The design of complex parameter self-tuning fuzzy control system and efficient simulation were achieved. The models were simulated for different load conditions in order to demonstrate the effectiveness of the proposed controller. Simulation results emphasized the improved performance in comparison with fixed gain controllers. The proposed method overcomes the drawbacks of a conventional fixed gain controller and improvement was achieved in terms of settling time, oscillations and overshoot.

Fault Diagnosis Based on Rough Set and BP Neural Network (RS-BP) for Gas Turbine Engine

This paper presents a new fusion diagnosis based on rough set and BP neural network for the fault diagnosis of gas turbine. The frame is designed to fusion fault diagnosis, which is composed by three parts: the rough set data pre-processor, rough set diagnosis model and BP neural network diagnosis model. Aiming at the difficulty in getting adequate fault samples in fault diagnosis, rough set theory is first used to process the original data, establish the decision table and generate rules, which can eliminate the redundant information and build the rough set diagnosis model. After that, according to the optimal decision attribute pre-treated by rough set, BP neural network is designed for fault diagnosis, which can reduce the scale of neural network, improve the identification rate, and improve the efficiency of the whole fusion diagnosis system. Finally, an example of gas turbine generator sets fuel system is taken as a case study to demonstrate the feasibility and validity of the proposed method in this paper.

Study on Data Detector of Synchro-Self-Shifting Clutch on Combined Diesel or Gas Turbine Power Plant

The failure of a synchro-self-shifting clutch, a key component in many power units, can lead to the loss of engine power, thereby the failure of the power plant as a whole. This paper introduces the hardware design and software development of SSS clutch data detector based on 16 Bite microcontroller of Motorola, it records the key parameters of SSS Clutch in real time, which can achieve the accident reconstruction and primary diagnoses of the highest possibility of a failure occurring, it is significant importance for research the highest possibility of a failure occurring prediction and fault diagnosis.

A Study on the Stability of Marine Gas Turbine Generation Module Power System

Based on modular modeling idea, the modular model of marine generation system was set by the technology of systematic simulation. One set of simulation models of marine gas turbine generation system was generated. Results show that flywheel energy storage device can enhance the stability of power grid and play a better role in making marine gas turbine generation system stable under heavy load fluctuations.