Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.v42.i2.40
pages 143-164

Influence of Internal Cyclone Flow on Adiabatic Film Cooling Effectiveness

Andreas Lerch
Institute of Gas Turbines and Aerospace Propulsion, Technische Universität Darmstadt, 64287 Darmstadt, Germany
Heinz-Peter Schiffer
Institute of Gas Turbines and Aerospace Propulsion, Technische Universität Darmstadt, 64287 Darmstadt, Germany

Краткое описание

The adiabatic film cooling effectiveness on the surface of a symmetrical blade model was measured for eight cylindrical, 59° inclined cooling holes. The holes were fed with different flow types using a cylindrical leading-edge channel. Two configurations were compared: on the one hand, a leading-edge channel flow without swirl (datum configuration), using a sharp-edged inlet; on the other hand, a new cyclone cooling configuration with a positive swirl. The experiments were carried out using the calibrated ammonia diazo technique. The blowing ratios were varied between 0.6 and 1.2, and the film cooling discharge was set to either 20% or 50%. For all these operation points, multiple experiments were conducted and combined using a weighting average method to produce a high full-range resolution. The lateral and area-averaged adiabatic effectiveness is presented up to 45D downstream of the cooling holes. The measurements show a higher area-averaged effectiveness immediately downstream of the cooling holes when using the cyclone cooling configuration. This is due to nonsymmetric flow structures inside the cooling holes. Further downstream, however, it decreases faster. With a low film cooling discharge and rising blowing ratios, these effects are more pronounced.


Articles with similar content:

INFLUENCE OF INTERNAL CYCLONE FLOW ON ADIABATIC FILM COOLING EFFECTIVENESS
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Heinz-Peter Schiffer, Andreas Lerch
Effect of Swirled Leakage Flow on Endwall Film-Cooling
International Heat Transfer Conference 15, Vol.20, 2014, issue
Terrence W. Simon, Shu Fujimoto, Richard J. Goldstein, Chiyuki Nakamata, Matthew Stinson
Experimental and Computational Film Cooling with Backward Injection for Cylindrical and Fan-Shaped Holes
International Heat Transfer Conference 15, Vol.20, 2014, issue
Shiou-Jiuan Li, Je-Chin Han, Wei-Hsiang Wang, Andrew F Chen
EFFECT OF ANTI-VORTEX HOLE ANGLE ON THE FILM COOLING EFFECTIVENESS
Heat Transfer Research, Vol.48, 2017, issue 6
Jae Su Kwak, Younggi Moon, Soon Sang Park, Jung Shin Park
THE EFFECT OF EMBEDDED VORTICES ON FILM COOLING WITH COMPOUND ANGLE ORIENTATIONS
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2009, issue
Joon Sik Lee, Hyo Kyung Chung, Young Su Na