Three-Dimensional Analysis of Hot Streak Attenuation in a High Pressure Turbine Stage

Aksoy, Hakan; Liu, Jong-Shang; Couey, Paul; Reyes, Victor

doi:10.2514/6.2002-3646

38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit 2002

DOI: 10.2514/6.2002-3646

|View full text |Cite

Three-Dimensional Analysis of Hot Streak Attenuation in a High Pressure Turbine Stage

Hakan Aksoy¹,

Jong-Shang Liu²,

Paul Couey³

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2008

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is very significant to perform the investigation on the migration characteristics of the hot streaks in the turbine flowpath for the design and optimization of a high performance cooling system. Since the 1970s, a series of numerical and experimental researches [1][2][3][4][5][6][7][8][9][10][11] have been performed by oversea research groups in order to explore the migration characteristics of the hot streaks in turbines. However, until the 2000s [12][13][14] , numerical investigations on the hot streaks migration were not carried out in China.…”

mentioning

confidence: 99%

Investigation of influencing factors of hot streaks migration in high pressure stage of a vaneless counter-rotating turbine

Zhao

Wang

Tang

et al. 2008

Sci. China Ser. E-Technol. Sci.

View full text Add to dashboard Cite

Three-dimensional, viscous, and unsteady CFD simulations have been performed in order to reveal the influencing factors of hot streaks migration in high pressure stage of a vaneless counter-rotating turbine. Based on the numerical results, the comparison between the case with inlet hot streaks and case without inlet hot streaks is carried out, which shows that the effect of inlet hot streaks on the load distributions of high pressure turbine airfoils is not notable and the airfoil load distributions are directly related to the inlet pressure distributions. The predicted results also indicate that the circumferential and radial movements of the hot streaks were not observed in the high pressure turbine stator. This means that the combined effects of secondary flow and buoyancy are very weak in the high pressure turbine stator. The numerical results also prove that the circumferential flow angle effect at the inlet of the high pressure turbine rotor, secondary flow effect and buoyancy effect are the mainly influencing factors to directly affect the migration characteristics of the hot streaks in the high pressure turbine rotor.counter-rotating turbine, hot streak, secondary flow, buoyancy effect, numerical simulation One of the main approaches to enhance specific work and reduce fuel consumption of gas turbine engines is to increase turbine inlet gas temperature. However, with the increase of the turbine inlet gas temperature, the temperature of the airfoil surfaces will also increase, or even exceed the allowable metal temperature. In this situation, cooling system must be applied to keeping the metal temperature under its tolerable temperature in order to maintain the normal operation of the engines. The optimum design of cooling system requires knowledge about the temperature distributions on the airfoil surfaces and the migration characteristics of the cold and hot gas in the turbine flowpath. Experimental data taken from actual gas turbine combustors indicate that the flow exiting in the combustor can contain both circumferential and radial temperature gradients. The phenomenon is known as hot streaks, arising from the combination of the combustor core

show abstract

mentioning

confidence: 99%

Investigation of influencing factors of hot streaks migration in high pressure stage of a vaneless counter-rotating turbine

Zhao

Wang

Tang

et al. 2008

Sci. China Ser. E-Technol. Sci.

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Three-Dimensional Analysis of Hot Streak Attenuation in a High Pressure Turbine Stage

Cited by 1 publication

References 2 publications

Investigation of influencing factors of hot streaks migration in high pressure stage of a vaneless counter-rotating turbine

Investigation of influencing factors of hot streaks migration in high pressure stage of a vaneless counter-rotating turbine

Contact Info

Product

Resources

About