Results 211 to 220 of about 16,280 (262)

Effect of purge flow on endwall flow and heat transfer characteristics of a gas turbine blade

Applied Thermal Engineering, 2017
Abstract This paper presents a numerical investigation on the influence of purge flow on endwall flow and heat transfer characteristics of a gas turbine blade. Upon the numerical validation with experiment data, the Reynolds-averaged Navier-Stokes equations coupled with standard k - ω turbulence model are utilized in this study.
Zhenping Feng
exaly   +2 more sources

The Interaction of Purge Flows With Secondary Flow Features in Turbine Center Frames

Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, 2021
Abstract The turbine center frame (TCF) is an inherent component of modern turbofan aircraft engines, used for facilitating the large radius change between the high-pressure (HPT) and low-pressure (LPT) turbines. Secondary flow features that develop in the TCF result in total pressure loss of the mainstream flow and a subsequent ...
Patinios, Marios, Merli, Filippo, Hafizovic, Asim, Göttlich, Emil   +3 more
openaire   +1 more source

Purging flow protection of infrared telescopes

AIAA Journal, 1984
The use of a purging gas flow as a means of protecting the cryogenic optics in space infrared telescopes from condensible gaseous contaminants has been studied. The significance of both the purge/contaminant differential scattering cross section and the purge gas density distribution is analyzed.
E. P. Muntz, M. Hanson
openaire   +1 more source

Aerodynamic Performance of Turbine Center Frames With Purge Flows—Part I: The Influence of Turbine Purge Flow Rates

Journal of Turbomachinery, 2018
This two-part paper deals with the influence of high-pressure turbine (HPT) purge flows on the aerodynamic performance of turbine center frames (TCF). Measurements were carried out in a product-representative one and a half-stage turbine test setup. Four individual purge mass flows differing in flow rate, pressure, and temperature were injected through
Stefan Zerobin, Andreas Peters, Sabine Bauinger, Ashwini Bhadravati Ramesh, Michael Steiner, Franz Heitmeir, Emil Göttlich   +6 more
openaire   +1 more source

Sensitivity of Turbine Efficiency and Flow Structures to Varying Purge Flow

Journal of Propulsion and Power, 2010
In many turbines, a small amount of air is ejected at the hub rim seal to prevent ingestion of hot gases into the cavity between the stator and the disk. This paper presents an experimental and computational investigation on the sensitivity of a 1.5-stage high-work axial turbine to varying purge flow rates equipped with nonaxisymmetric end walls.
Schuepbach, P., Abhari, R. S., Rose, M. G., Gier, J.   +3 more
openaire   +2 more sources

Aerodynamic Performance of Turbine Center Frames With Purge Flows—Part II: The Influence of Individual Hub and Tip Purge Flows

Journal of Turbomachinery, 2018
The aerodynamic behavior of turbine center frame (TCF) ducts under the presence of high-pressure turbine (HPT) purge flows was experimentally investigated in this two-part paper. While the first part of the paper demonstrated the impact of varying the purge flow rates (PFR) on the loss behavior of two different TCF designs, the second part concentrates
Stefan Zerobin, Christian Aldrian, Andreas Peters, Franz Heitmeir, Emil Göttlich   +4 more
openaire   +1 more source

Refractory in Ladle Flow Control and Purging System

2020
Continuous strive towards new technology introduced reliable flow control systems that enable safe and prolong tapping liquid steel from ladle to tundish with consistent and high casting rate. Thus, synchronization of operational parameters, appropriate refractory and analysis of probable failure are essential and encountered.
Subir Biswas, Debasish Sarkar
openaire   +1 more source

Towards the determination of regional purging flow rate

Building and Environment, 1997
Abstract This paper deals with the description and determination of the purging flow rate, U p , for ventilation systems or equivalent flow systems. The regional purging flow rate and its use are discussed and proposed. By using the mass conservation principle, U p is embodied in various accessible mathematical expressions in terms of the transfer ...
Shia-Hui Peng, Lars Davidson
openaire   +1 more source

Parameter sensitivity analysis of the interaction between purge flow and mainstream

Applied Thermal Engineering
Xiaoyu Yang
exaly   +2 more sources