Research on Optimization of Replacement Cycle of Gas Turbine Multi-stage Inlet Filter

2021 ◽  
Author(s):  
Bai Yun Shan ◽  
Hao Jian Gang ◽  
Tian Xin
Keyword(s):  
Gas Turbine ◽  
Multi Stage ◽  
Replacement Cycle

Continuous adjoint aerodynamic optimization design for multi-stage gas turbine with cooling air

2017 ◽  
Vol 89 (3) ◽  
pp. 444-456
Author(s):  
Lei Chen ◽  
Jiang Chen
Keyword(s):  
Gas Turbine ◽  
Optimization Design ◽  
Adjoint Method ◽  
Air Injection ◽  
Aerodynamic Optimization ◽  
Content Type ◽  
Multi Stage ◽  
Surface Code ◽  
Cooling Air ◽  
Continuous Adjoint

Purpose This paper aims to conduct the optimization of the multi-stage gas turbine with the effect of the cooling air injection based on the adjoint method. Design/methodology/approach Continuous adjoint method is combined with the S2 surface code. Findings The optimization of the stagger angles, stacking lines and the passage can improve the attack angles and restrain the development of the boundary, reducing the secondary flow loss caused by the cooling air injection. Practical implications The aerodynamic performance of the gas turbine can be improved via the optimization of blade and passage based on the adjoint method. Originality/value The results of the first study on the adjoint method applied to the S2 surface through flow calculation including the cooling air effect are presented.

Multi-Stage System Identification of a Gas Turbine

2017 ◽  
Author(s):  
Amit Pandey ◽  
Maurício de Oliveira ◽  
Chad M. Holcomb
Keyword(s):  
Gas Turbine ◽  
Closed Loop ◽  
Open Loop ◽  
Loop System ◽  
Closed Loop Control ◽  
Input Output ◽  
Open Loop System ◽  
Loop Control ◽  
Multi Stage ◽  
Identification Techniques

Several techniques have recently been proposed to identify open-loop system models from input-output data obtained while the plant is operating under closed-loop control. So called multi-stage identification techniques are particularly useful in industrial applications where obtaining input-output information in the absence of closed-loop control is often difficult. These open-loop system models can then be employed in the design of more sophisticated closed-loop controllers. This paper introduces a methodology to identify linear open-loop models of gas turbine engines using a multi-stage identification procedure. The procedure utilizes closed-loop data to identify a closed-loop sensitivity function in the first stage and extracts the open-loop plant model in the second stage. The closed-loop data can be obtained by any sufficiently informative experiment from a plant in operation or simulation. We present simulation results here. This is the logical process to follow since using experimentation is often prohibitively expensive and unpractical. Both identification stages use standard open-loop identification techniques. We then propose a series of techniques to validate the accuracy of the identified models against first principles simulations in both the time and frequency domains. Finally, the potential to use these models for control design is discussed.

High Capacity and High Efficiency Multi-Stage Air Intake System

2002 ◽  
Author(s):  
Alan Hashem ◽  
Dani Fadda ◽  
Kenneth J. Fewel
Keyword(s):  
Gas Turbine ◽  
Marine Environment ◽  
High Efficiency ◽  
High Capacity ◽  
Future Market ◽  
Air Treatment ◽  
Intake System ◽  
Multi Stage ◽  
Air Intake ◽  
Gas Turbine Combustion

An advanced three stage filtration/separation air intake system (Compact II) is introduced in this paper. The system was developed to meet the current and expected future market demands for gas turbine combustion air treatment in a marine environment. Developing and testing of the Compact II are subjects of this paper.

Multi-Stage Ejector Design and Numerical Simulation for Marine Gas Turbine

2014 ◽  
Vol 1078 ◽  
pp. 280-285 ◽  
Author(s):  
Tao Sun ◽  
Bo Wan ◽  
Chang Jiang Sun ◽  
Zheng Wei Ma
Keyword(s):  
Gas Turbine ◽  
Rational Design ◽  
Exhaust Temperature ◽  
Second Stage ◽  
Multi Stage ◽  
Gas Turbine Exhaust ◽  
Narrow Space ◽  
Independent Design ◽  
The Impact ◽  
Turbine Exhaust

With the continuous development of infrared-guided weapons, the survival of ship at sea faces increasingly challenges especially high-risk waters. The ship gas turbine exhaust ejector is the core component parts, charged with the task of reducing or even eliminating the infrared radiation signal of ship gas turbine exhaust systems. In the designing of exhaust ejector, structure forms of nozzle have a big influence on its ejector effect. Making a rational design of nozzle, which working in a narrow space, to reduce the exhaust temperature effectively while minimizing the impact of flow of gas turbine body has always been a focus and difficulty. In this article, a multistage ejector is designed by adding a second-stage ejector section based on an independent design of single-stage ejector.

Assessment of Loss Correlations for Performance Prediction of Low Reaction Gas Turbine Stages

2008 ◽  
Author(s):  
Ernesto Benini ◽  
Giovanni Boscolo ◽  
Andrea Garavello
Keyword(s):  
Fluid Dynamics ◽  
Experimental Data ◽  
Computational Fluid Dynamics ◽  
Gas Turbine ◽  
Performance Prediction ◽  
Reasonable Accuracy ◽  
Algebraic Models ◽  
Two Stage ◽  
Accurate Model ◽  
Multi Stage

In spite of the remarkable advances in the field of the Computational Fluid Dynamics, algebraic models built upon empirical loss and deviation correlations are still one of the most reliable and effective tools to predict the performance of gas turbine stages with reasonable accuracy, especially when low-reaction, multi-stage architectures are considered. This paper deals with a comparison among some of the most popular loss correlations used by gas turbine manufacturers; such comparison is performed on a two-stage low-reaction turbine for which detailed experimental data are available. An overall assessment on the validity of loss correlations is carried out to help the designer/analyst using the most accurate model when both on- and off-design are to be carried out.

Emissions in combustion of lean methane-air and biomass-air mixtures supported by primary hot burned gas in a multi-stage gas turbine combustor

2007 ◽  
Vol 31 (2) ◽  
pp. 3131-3138 ◽  
Author(s):  
Sadamasa Adachi ◽  
Atushi Iwamoto ◽  
Shigeru Hayashi ◽  
Hideshi Yamada ◽  
Shigehiko Kaneko
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Combustor ◽  
Multi Stage

scholarly journals A Combined System of Fuel Washing Involving Both Centrifuges and Electrostatic Separators: A Hybrid

1978 ◽  
Author(s):  
E. G. Spalding ◽  
G. E. Krulls
Keyword(s):  
Gas Turbine ◽  
Hybrid System ◽  
Electrostatic Precipitator ◽  
Hybrid Plant ◽  
Wash Water ◽  
Combined System ◽  
Multi Stage ◽  
Electrostatic Precipitators ◽  
Heavy Fuels ◽  
Two Stages

In the gas turbine business, heavy fuels have traditionally been treated by plants using either centrifuges or electrostatic precipitators as water/fuel separators. These systems individually have certain disadvantages when applied to treating difficult heavy fuels, which can be overcome by combining the two systems whereby in the first-stage centrifuges are used followed by electrostatic precipitators in the second and subsequent stages of the treatment. The first part of the paper will deal with the Hybrid system itself, outlining its advantages, to be followed by a second part which will provide a description of the world’s first Hybrid plant which will have been built for Qatar. This plant has two stages, the first with seven centrifuges and the second with an electrostatic precipitator. Extraction of the salt in the oil to the wash water is brought about in both stages by a multi-stage rotary paddle type extractor which will also be described.

Simulation of a Multi-Stage Cooling Scheme for Gas Turbine Engines: Part I

2007 ◽  
Author(s):  
M. Ghorab ◽  
I. Hassan ◽  
M. Beauchamp
Keyword(s):  
Gas Turbine ◽  
Film Cooling ◽  
Lateral Spreading ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Cooling Effectiveness ◽  
Film Cooling Effectiveness ◽  
Multi Stage ◽  
Gap Height ◽  
Internal Gap

This paper presents heat transfer characteristics for a Multi-Stage Cooling Scheme (MSCS) design applicable to high temperature gas turbine engines in aerospace and electric power generation. The film cooling and impingement techniques are considered concurrently throughout this study. The proposed design involves passing cooling air from the inside of the turbine blade to the outside through three designed stages. The coolant air is passed through a circular hole into an internal gap creating an impingement of air inside the blade. It then exits through a sequence of two differently shaped holes onto the blade’s external surface. The film cooling effectiveness is enhanced by increasing the internal gap height and offset distance. This effect is significantly diminished however by changing the inclination angle from 90° to 30° at large gap height. The coolant momentum became more uniform by creating the internal gap consequently the coolant air is spread closer to the external blade surface. This reduces jet liftoff as the air exits its hole and also provides internal cooling for the blade. The hole exit positioned on the outer surface of the blade is designed to give a positive and a wide downstream lateral spreading. The MSCS demonstrates greater film cooling effectiveness performance than traditional schemes.

scholarly journals Gas Turbine Operating Experience in a Power / Seawater Desalination Cogeneration Mode

1997 ◽  
Author(s):  
Akili D. Khawaji ◽  
Tariq Khan ◽  
Jong-Mihn Wie
Keyword(s):  
Gas Turbine ◽  
Heat Recovery ◽  
Operating Experience ◽  
Royal Commission ◽  
Evaporation Process ◽  
Heat Recovery Steam Generator ◽  
Steam Generation ◽  
Turbine Generators ◽  
Multi Stage ◽  
And Performance

The Royal Commission power, desalination and seawater cooling (PD&SC) plant located in Madinat Yanbu Al-Sinaiyah, Saudi Arabia, includes eight MS-7001 E frame 7 gas turbine generators (GTGs). The GTGs are used in cogenerating electricity and process steam primarily required for desalinating seawater by a multi-stage flash (MSF) evaporation process. This paper describes the operating experience of the GTGs in a simple cycle and a cogeneration mode coupled to heat recovery steam generation. The significant problems, countermeasures and the GTG and heat recovery steam generator (HRSG) reliability, availability and performance are also discussed in the paper.

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