NDLI: Study on Advanced Internal Cooling Technologies for the Development of Next-Generation Small-Class Aircraft Engines

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Fujimoto, Shu Okita, Yoji Fukuyama, Yoshitaka Yamane, Takashi Mimura, Fujio Matsushita, Masahiro Yoshida, Toyoaki
Copyright Year	2008
Abstract	An innovative internal cooling structure named multi-slot cooling has been invented for high-pressure turbine (HPT) nozzles and blades. This cooling structure has been designed to be simple, inexpensive, and to exhibit good cooling performance. In order to confirm the cooling performance of this structure, test pieces of dummy turbine nozzles were manufactured. Three geometric parameters (width of slots, overall height of cooling channel, and height of jet impingement) are associated with these test pieces. The cooling performance tests were conducted by using these test pieces for several Reynolds numbers of the mainstream hot gas [2.2 × 105 – 3.4 × 105] and cooling airflow [3 × 103 – 1 × 104]. Infrared (IR) images of the heated surfaces of the test pieces were captured for every Reynolds number in the tests, and then the distributions of the cooling effectiveness were obtained. Simultaneously, the pressure losses were measured. This paper describes the hot gas flow tests performed to confirm the effects of the geometric parameters on the cooling performance and pressure loss, and to obtain data of Nusselt number and pressure loss coefficient for the design of turbine nozzles in the future by applying this new cooling structure to next-generation small-class aircraft engines. Additionally a preliminary analysis of airfoil cooling was performed to evaluate both cooling performance of conventional impingement cooling and multi-slot cooling in applying to a HPT nozzle, as a result it was found that the multi-slot cooling is well applicable to cooling of HPT airfoils.
Sponsorship	International Gas Turbine Institute
Starting Page	431
Ending Page	441
Page Count	11
File Format	PDF
ISBN	9780791843147
DOI	10.1115/GT2008-50444
e-ISBN	0791838242
Volume Number	Volume 4: Heat Transfer, Parts A and B
Conference Proceedings	ASME Turbo Expo 2008: Power for Land, Sea, and Air
Language	English
Publisher Date	2008-06-09
Publisher Place	Berlin, Germany
Access Restriction	Subscribed
Subject Keyword	Cooling Blades Impingement cooling Reynolds number Airfoils Aircraft engines Pressure Design High pressure (physics) Air flow Gas flow Testing performance Nozzles Turbines
Content Type	Text
Resource Type	Article

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