Aerodynamic Design and Experimental Study of Marine Gas Turbine Exhaust Volutes

1981 ◽  
Author(s):  
Lu Xingsu ◽  
Pan Kunyuan ◽  
Wu Zuomin
Keyword(s):  
Gas Turbine ◽  
Exhaust System ◽  
Aerodynamic Characteristics ◽  
Basic Design ◽  
Aerodynamic Design ◽  
Engine Room ◽  
Annular Diffuser ◽  
Gas Turbine Exhaust ◽  
Selection Of ◽  
Turbine Exhaust

The aerodynamic characteristics of the exhaust system have an important bearing on the economic aspects of the marine gas turbine. The exhaust volute is an important component of the exhaust system. The design of turbine exhaust volutes must take into account the structural demands of the gas turbine, the layout of the exhaust system as a whole in the engine room and the hull as well as its overall dimension requirements. This paper discusses the design principles of exhaust volutes. Given the hub-tip ratio dl/D1 of turbine exit (volute entry), a method is developed to rationally select the axial length L and radial width B. The selection of an annular diffuser and the relevant parameters along with the coordination of diffuser and collector are analyzed. On the basis of an analysis of experimental data the basic design criteria of exhaust volutes are proposed.

Luxury Liners Go Green

1998 ◽  
Vol 120 (07) ◽  
pp. 72-73 ◽  
Author(s):  
Michael Valent
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Gas Turbines ◽  
First Century ◽  
System A ◽  
Cruise Ships ◽  
Engine Room ◽  
Electric Drive System ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

This article reviews that twenty-first century passengers on the Royal Caribbean International and Celebrity Cruises are set to make history in style. Up to six of Royal Caribbean’s Voyager- and Millennium-class vessels will be the first cruise ships ever powered by General Electric’s gas turbines. In addition to reducing engine-room noise and vibration and cutting emissions, this propulsion system—a departure from the traditional diesel engine—will make it possible for ships to set sail with a reduced maintenance crew and smaller parts inventory. Royal Caribbean International currently operates a fleet of 12 ships. In the Royal Caribbean application, the GE gas turbine will be used to drive generators that will provide electricity to propeller motors. The steam turbine will recover heat from the gas turbine exhaust for other uses. This combined gas turbine and steam turbine integrated electric drive system represents a departure from diesel engines in more than one respect.

Single Process Plant Application of a Gas Turbine Generator With Recovery Boiler

1971 ◽  
Author(s):  
R. W. Klein
Keyword(s):  
Gas Turbine ◽  
Turbine Generator ◽  
Engineering Construction ◽  
Start Up ◽  
Process Plant ◽  
Single Process ◽  
Recovery Boiler ◽  
Gas Turbine Exhaust ◽  
Selection Of ◽  
Turbine Exhaust

This paper consists of the application considerations given for the selection of on-site power generation using a gas turbine with a recovery boiler in the process chemical industry. The additional use of 400 psig steam from recovery heat of the gas turbine exhaust used for process steam is evaluated. The techniques used for engineering, construction, training, and start-up are discussed. The performance of the unit after 30,000 operating hours, including reliability and a discussion of equipment problems, is included.

scholarly journals Gas Turbine Exhaust System Health Management Based on Recurrent Neural Networks

Procedia CIRP ◽  
2019 ◽  
Vol 83 ◽  
pp. 630-635 ◽  
Author(s):  
Fei Zhao ◽  
Liang Chen ◽  
Tangbin Xia ◽  
Zikun Ye ◽  
Yu Zheng
Keyword(s):  
Neural Networks ◽  
Gas Turbine ◽  
Recurrent Neural Networks ◽  
Health Management ◽  
Exhaust System ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

An Experimental Analysis of Flow Through Annular Diffuser With and Without Struts

2006 ◽  
Author(s):  
R. Prakash ◽  
P. Sudhakar ◽  
N. V. Mahalakshmi
Keyword(s):  
Gas Turbine ◽  
Static Pressure ◽  
Structural Members ◽  
Pressure Development ◽  
Annular Diffuser ◽  
Fundamental Research ◽  
Flow Through ◽  
Gas Turbine Exhaust ◽  
Industrial Gas Turbine ◽  
Turbine Exhaust

This paper presents the static pressure development and the effect of struts on the performance of an annular diffuser. A typical exhaust diffuser of an industrial gas turbine is annular with structural members, called struts, which extend radially from the inner to the outer annulus wall. An annular diffuser model, primarily intended for fundamental research, has been tested on a wind tunnel. Similar conditions that prevail in an industrial gas turbine have been generated in the diffuser. Measurements were made using a five holed Pitot probe. The research had been carried out to make a detailed investigation on the effect of struts and to advance computational and design tools for gas turbine exhaust diffusers.

scholarly journals The Effects of Scale Factor on the Aero-Thermodynamic and Infrared Radiation Performance of Naval Gas Turbine Exhaust System With Infrared Signature Suppression Device

1993 ◽  
Author(s):  
Fangyuan Zhong ◽  
Yu Dai
Keyword(s):  
Gas Turbine ◽  
Tube Wall ◽  
Exhaust System ◽  
Scale Factor ◽  
Scale Model ◽  
Exhaust Plumes ◽  
Infrared Signature ◽  
Different Dimensions ◽  
Gas Turbine Exhaust ◽  
Turbine Exhaust

On the basis of scale model tests in two different dimensions of marine gas turbine exhaust system with infrared signature suppression device, and in the light of similarity analysis and simplified numerical calculation, this paper discusses the effects of scale factor on the flow (flow resistance), temperature (of air-flow and tube wall), and infrared radiant (of exhaust plumes and exhaust uptake inner wall) fields of the exhaust system, and accordingly estimates the corresponding parameters of real ship exhaust systems as well as presents the magnitude of scale factor impacts and the recommended values for selecting the scale factor.

Flow Guiding and Distributing Devices on the Exhaust Side of Stationary Gas Turbines

1990 ◽  
Vol 112 (1) ◽  
pp. 80-85
Author(s):  
F. Fleischer ◽  
C. Koerner ◽  
J. Mann
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Gas Flow ◽  
Flow Simulation ◽  
Exhaust System ◽  
Flow Distribution ◽  
Scale Model ◽  
Gas Turbine Exhaust ◽  
First Time ◽  
Turbine Exhaust

Following repeated cases of damage caused to exhaust silencers located directly beyond gas turbine diffusers, this paper reports on investigations carried out to determine possible remedies. In all instances, an uneven exhaust gas flow distribution was found. The company’s innovative approach to the problem involved constructing a scale model of a complete gas turbine exhaust system and using it for flow simulation purposes. It was established for the first time that, subject to certain conditions, the results of tests conducted on a model can be applied to the actual turbine exhaust system. It is shown that when an unfavorable duct arrangement might produce an uneven exhaust flow, scale models are useful in the development of suitable flow-distributing devices.

Numerical and Experimental Study on the Suppression for the Infrared Signatures of a Marine Gas Turbine Exhaust System

2000 ◽  
Author(s):  
Shaorong Zhou ◽  
Zhaohui Du ◽  
Hanping Chen ◽  
Fangyuan Zhong
Keyword(s):  
Gas Turbine ◽  
Exhaust System ◽  
Scale Model ◽  
Ir Radiation ◽  
Exhaust Duct ◽  
Ir Signature ◽  
Gas Turbine Exhaust ◽  
Control Volumes ◽  
Cooling Air ◽  
Turbine Exhaust

The flow and thermal fields within the cooling air injection device which is widely used to suppress the infrared (IR) signatures of a marine gas turbine exhaust system were studied numerically and experimentally. A turbulence near-wall model based on the wall function method was adopted. The discretization equations were derived for the control volumes when conjugate heat transfer exists at their interfaces, with the radiation heat flux at the interfaces appearing as an additional source term. The solution method of entrained velocities at the entrance of secondary flow was introduced. The distributions of temperature and static pressure on the diffuser surface, and the temperature of gas at the outlet of the exhaust duct were simulated numerically. The numerical calculated results agreed well with corresponding scale model experimental data. Lastly, the measured IR radiation distributions by scale model experiments at different view angles and various engine power settings, with and without IR signature suppression (IRSS) devices were presented.

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.

scholarly journals Establishing the Longitudinal Temperature Distribution for Fully Developed Turbulent Flow in a Gas Turbine Exhaust Duct

1970 ◽  
Author(s):  
P. J. Torpey ◽  
R. M. Welch
Keyword(s):  
Temperature Distribution ◽  
Gas Turbine ◽  
Accurate Determination ◽  
Exhaust System ◽  
Longitudinal Temperature ◽  
Exhaust Duct ◽  
Fully Developed Turbulent Flow ◽  
Gas Turbine Exhaust ◽  
Heat Flow Model ◽  
Turbine Exhaust

The ability to predict the longitudinal temperature distribution along a gas turbine exhaust duct facilitates the selection of the proper duct material and the appropriate paint or other external coating. It also allows accurate determination of thermal expansion over the entire length. A first-order differential equation is derived from a one-dimensional heat flow model for the exhaust system. A digital computer program employing this model is also presented. The computer solution, in addition to eliminating tedious manual computation, extends the analysis capability by accounting for changes in temperature and flow-dependent variables along the duct length. Measured gas and duct wall temperatures for a 1.5-kw gas turbine exhaust system are compared with values predicted by the analysis. Good agreement is noted throughout that portion of the system in which fully developed flow exists.

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