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.

A Sensitivity Study of Gas Turbine Exhaust Diffuser-Collector Performance at Various Inlet Swirl Angles and Strut Stagger Angles

2017 ◽  
Author(s):  
Michal P. Siorek ◽  
Stephen Guillot ◽  
Song Xue ◽  
Wing F. Ng
Keyword(s):  
Gas Turbine ◽  
Flow Direction ◽  
Flow Behavior ◽  
Exhaust System ◽  
Sensitivity Study ◽  
Inlet Swirl ◽  
Inlet Conditions ◽  
Gas Turbine Exhaust ◽  
The Impact ◽  
Turbine Exhaust

This paper describes studies completed using a quarter-scaled rig to assess the impact of turbine exit swirl angle and strut stagger on a turbine exhaust system consisting of an integral diffuser-collector. Advanced testing methods were applied to ascertain exhaust performance for a range of inlet conditions aerodynamically matched to flow exiting an industrial gas turbine. Flow visualization techniques along with complementary Computational Fluid Dynamics (CFD) predictions were used to study flow behavior along the diffuser endwalls. Complimentary CFD analysis was also completed with the aim to ascertain the performance prediction capability of modern day analytical tools for design phase and off-design analysis. The K-Epsilon model adequately captured the relevant flow features within both the diffuser and collector, and the model accurately predicted the recovery at design conditions. At off-design conditions, the recovery predictions were found to be pessimistic. The integral diffuser-collector exhaust accommodated a significant amount of inlet swirl without a degradation in performance, so long as the inlet flow direction did not significantly deviate from the strut stagger angle. Strut incidence at the hub was directly correlated with reduction in overall performance, whereas the diffuser-collector performance was not significantly impacted by strut incidence at the shroud.

A Sensitivity Study of Gas Turbine Exhaust Diffuser-Collector Performance at Various Inlet Swirl Angles and Strut Stagger Angles

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
Michal P. Siorek ◽  
Stephen Guillot ◽  
Song Xue ◽  
Wing F. Ng
Keyword(s):  
Gas Turbine ◽  
Flow Direction ◽  
Flow Behavior ◽  
Exhaust System ◽  
Sensitivity Study ◽  
Inlet Swirl ◽  
Inlet Conditions ◽  
Gas Turbine Exhaust ◽  
The Impact ◽  
Turbine Exhaust

This paper describes studies completed using a quarter-scaled rig to assess the impact of turbine exit swirl angle and strut stagger on a turbine exhaust system consisting of an integral diffuser-collector. Advanced testing methods were applied to ascertain exhaust performance for a range of inlet conditions aerodynamically matched to flow exiting an industrial gas turbine. Flow visualization techniques along with complementary computational fluid dynamics (CFD) predictions were used to study flow behavior along the diffuser end walls. Complimentary CFD analysis was also completed with the aim to ascertain the performance prediction capability of modern day analytical tools for design phase and off-design analysis. The K-Epsilon model adequately captured the relevant flow features within both the diffuser and collector, and the model accurately predicted the recovery at design conditions. At off-design conditions, the recovery predictions were found to be pessimistic. The integral diffuser-collector exhaust accommodated a significant amount of inlet swirl without degradation in performance, so long as the inlet flow direction did not significantly deviate from the strut stagger angle. Strut incidence at the hub was directly correlated with reduction in overall performance, whereas the diffuser-collector performance was not significantly impacted by strut incidence at the shroud.

Study of New Exhaust Ejector for Marine Gas Turbine

2014 ◽  
Author(s):  
Tao Sun ◽  
Minghui Yuan ◽  
Yuehan Xu ◽  
Guohui Wang ◽  
Nan Ye
Keyword(s):  
Gas Turbine ◽  
Exhaust System ◽  
Simulation Method ◽  
Multi Stage ◽  
Risk Areas ◽  
New Type ◽  
Ejector System ◽  
Gas Turbine Exhaust ◽  
Suppression System ◽  
Turbine Exhaust

With the development at infrared guidance weapon, the survival of the ship, especially in high risk areas, is facing serious challenges. In order to improve its survival ability, infrared suppression system emerges. Marine gas turbine exhaust ejector system is its core component, which is responsible for reducing or even eliminating the infrared radiation signal of marine gas turbine exhaust system. Based on collecting data on many sorts of ejectors, we sort out literature related to gas turbine exhaust ejector. From the view of ejector structure, the paper briefly describes the development of gas turbine exhaust ejector used on ships in domestic and foreign. Put forward two major structural innovations: the structure of nozzle changes from circular to rectangular and diffuser adopts multilevel structure. A new type of marine gas turbine exhaust ejector was designed. Ejector model is simplified. Use numerical simulation method to predict the single stage ejector and multi-stage ejectors. Further structural optimization plan and design can be made based on this essay.

Research on Characteristics of a New Marine Gas Turbine Exhaust Ejector Device

2016 ◽  
Author(s):  
Tao Sun ◽  
Lanxin Sun ◽  
Yigang Luan ◽  
Peng Sun
Keyword(s):  
Gas Turbine ◽  
Performance Optimization ◽  
Structural Parameters ◽  
Research Result ◽  
Exhaust System ◽  
Reference Value ◽  
Multi Stage ◽  
Gas Turbine Exhaust ◽  
And Performance ◽  
Turbine Exhaust

Naval ships, as well as commercial ships, are exposed to more risks than before with the development of IR-guided threats. IR Suppress System (IRSS) is used to reduce or eliminate the infrared signatures of exhaust system of the ship. In order to optimize the structure of exhaust ejector and shorten the cycle of research, it is essential to study the successful experiences on exhaust ejectors by scholars abroad. In this article two structure innovations are introduced: an improved structure of nozzle and multi-stage diffuser; A new type of exhaust ejector for marine gas turbine is designed. Through simplifying the ejector model, numerical simulation is applied to forecast the characteristics of both the single-stage ejector and the multistage ejector. Result indicates the effects of structural parameters on the performance parameters. This research result has certain reference value for marine gas turbine exhaust ejector design and performance optimization.

scholarly journals Design of Gas Turbine Exhaust Heat Recovery Boiler Systems

1984 ◽  
Author(s):  
V. L. Eriksen ◽  
J. M. Froemming ◽  
M. R. Carroll
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Performance Criteria ◽  
Exhaust Heat ◽  
Recovery Boilers ◽  
Gas Turbine Exhaust ◽  
The Impact ◽  
Exhaust Heat Recovery ◽  
Turbine Exhaust

Heat recovery boilers utilizing the exhaust from gas turbines continue to be viable as industrial cogeneration systems. This paper outlines the types of heat recovery boilers available for use with gas turbines (1–100 MW). It discusses the design and performance criteria for both unfired and supplementary fired gas turbine exhaust heat recovery boilers of single and multiple pressure levels. Equations to assist in energy balances are included along with design features of heat recovery system components. The economic incentive to achieve the maximum practical heat recovery versus the impact on boiler design and capital cost are examined and discussed. It is intended that the information presented in this paper will be of use to individuals who are not intimately familiar with gas turbine heat recovery systems so that they can better specify and evaluate potential systems.

Development of a tunable diode laser sensor for measurements of gas turbine exhaust temperature

2005 ◽  
Vol 82 (3) ◽  
pp. 469-478 ◽  
Author(s):  
X. Liu ◽  
J.B. Jeffries ◽  
R.K. Hanson ◽  
K.M. Hinckley ◽  
M.A. Woodmansee
Keyword(s):  
Gas Turbine ◽  
Diode Laser ◽  
Tunable Diode Laser ◽  
Laser Sensor ◽  
Exhaust Temperature ◽  
Diode Laser Sensor ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

scholarly journals Gas Turbine Exhaust Heat Recovery by Hybrid Steam/Ternary Aqueous Immiscible Liquid Cycle

1984 ◽  
Author(s):  
B. M. Burnside
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Heat Recovery ◽  
Immiscible Liquid ◽  
Working Fluid ◽  
Exhaust Temperature ◽  
Boiling Points ◽  
Exhaust Heat ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

The concept of the dual pressure steam/pure organic hybrid immiscible liquid cycle applied to recover exhaust heat from gas turbines is extended to include organic mixtures. Thermodynamics of the resulting ternary working fluid cycle is presented. For the cycle arrangement analysed it is calculated that the ternary steam/nonane/decane cycle with the organic very nonane rich produces about 2% more work than the corresponding all steam cycle for a typical gas turbine exhaust temperature. It is estimated that this advantage can be raised to about 4% by adding additional heaters at the stack end of the heat recovery generator. The analysis shows that it is unnecessary to use a pure alkane organic. A mixture containing up to about 5% of alkanes with higher boiling points than nonane is adequate.

Gas Turbine Combined Cycle Dynamic Simulation: A Physics Based Simple Approach

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
S. Can Gülen ◽  
Kihyung Kim
Keyword(s):  
Gas Turbine ◽  
Combined Cycle ◽  
Ease Of Use ◽  
Design And Optimization ◽  
Exhaust Temperature ◽  
Rapid Calculation ◽  
Solution Methods ◽  
Gas Turbine Exhaust ◽  
Computational Platform ◽  
Turbine Exhaust

This paper describes a simplified physics-based method derived from fundamental relationships to accurately predict the dynamic response of the steam bottoming cycle of a combined cycle power plant to the changes in gas turbine exhaust temperature and flow rate. The method offers two advantages: (1) rapid calculation of various modes of combined cycle transient performance such as startup, shutdown, and load ramps for conceptual design and optimization studies, and (2) transparency of governing principles and solution methods for ease of use by a wider range of practitioners. Thus, the method facilitates better understanding and dissemination of said studies. All requisite formulas and methods described in the paper are readily amenable to implementation on a computational platform of the reader's choice.

The Research on Characteristics of a New Type of Marine Gas Turbine Exhaust Ejector Device

2014 ◽  
Vol 540 ◽  
pp. 114-117
Author(s):  
Tao Sun ◽  
Ming Fei Zhang ◽  
Chang Jiang Sun ◽  
Zheng Wei Ma
Keyword(s):  
Gas Turbine ◽  
Performance Optimization ◽  
Structural Parameters ◽  
Research Result ◽  
Exhaust System ◽  
Multi Stage ◽  
New Type ◽  
Ejector Device ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

Marine gas turbine exhaust ejector device is responsible for reducing or eliminating the infrared signatures of exhaust system. In order to optimize the structure of exhaust ejector and shorten the cycle of research, it is essential to study the successful experiences on exhaust ejectors by scholars abroad. In this article two structure innovations were introduced: the nozzle structure changing from circular to rectangular and multi-stage diffuser, then a new type of marine gas turbine exhaust ejector was designed. Through simplifying the ejector model, numerical simulation was used to predict the characteristics of both the single-stage ejector and the multi-stage ejector. The result indicates the effects of structural parameters on the performance parameters. This research result has certain reference value for marine gas turbine exhaust ejector structure innovations and performance optimization.

Gas Turbine Combined Cycle Dynamic Simulation: A Physics Based Simple Approach

2013 ◽  
Author(s):  
S. Can Gülen ◽  
Kihyung Kim
Keyword(s):  
Gas Turbine ◽  
Combined Cycle ◽  
Ease Of Use ◽  
Design And Optimization ◽  
Exhaust Temperature ◽  
Rapid Calculation ◽  
Solution Methods ◽  
Gas Turbine Exhaust ◽  
Computational Platform ◽  
Turbine Exhaust

This paper describes a simplified physics-based method derived from fundamental relationships to accurately predict the dynamic response of the steam bottoming cycle of a combined cycle power plant to the changes in gas turbine exhaust temperature and flow rate. The method offers two advantages: (1) rapid calculation of various modes of combined cycle transient performance such as startup, shutdown and load ramps for conceptual design and optimization studies; (2) transparency of governing principles and solution methods for ease of use by a wider range of practitioners. Thus, the method facilitates better understanding and dissemination of said studies. All requisite formulas and methods described in the paper are readily amenable to implementation on a computational platform of the reader’s choice.

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