Theoretical and Experimental Investigation on Tip Forces and Temperature Distributions of the Brush Seal Coupled Aerodynamic ForceSource: Journal of Engineering for Gas Turbines and Power:;2014:;volume( 136 ):;issue: 005::page 52502DOI: 10.1115/1.4026074Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Based on a type of threedimensional slice model of a brush seal combined with the commercial CFD software FLUENT, the study calculated the leakage flow of the brush seal. The aerodynamic forces applied on upstream and downstream bristles are analyzed and reduced to a smaller amount of point forces for analysis convenience. The frictional coefficient between the bristle material Haynes 25 and rotor material 1Cr14Mn14Ni are tested. Tip forces including normal reaction and frictional forces caused by aerodynamic forces are quantitatively investigated under conditions with and without frictions using the torque balance principle and nonlinear beam theory (by ANSYS simulations), respectively. Torques, frictional heats, and the temperature distributions of the rotor and bristle pack are studied further. Details and characteristics of the flow and temperature distributions inside the bristle pack are presented. In the experiments, besides traditional tests, such as leakage and torque tests, an infrared camera is employed to capture temperature distributions at the interface of the rotor, bristle pack and nearby zones under various pressure differentials and rotation speeds. The threedimensional slice model is firstly verified by calculating the leakages, torques and temperature distributions of the brush seal and confirmed via experimentation. The influence of various frictional coefficients and pressure differentials on tip forces, torque and temperature distributions are also examined.
|
Show full item record
contributor author | Huang, Shouqing | |
contributor author | Suo, Shuangfu | |
contributor author | Li, Yongjian | |
contributor author | Wang, Yuming | |
date accessioned | 2017-05-09T01:07:37Z | |
date available | 2017-05-09T01:07:37Z | |
date issued | 2014 | |
identifier issn | 1528-8919 | |
identifier other | gtp_136_05_052502.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/154707 | |
description abstract | Based on a type of threedimensional slice model of a brush seal combined with the commercial CFD software FLUENT, the study calculated the leakage flow of the brush seal. The aerodynamic forces applied on upstream and downstream bristles are analyzed and reduced to a smaller amount of point forces for analysis convenience. The frictional coefficient between the bristle material Haynes 25 and rotor material 1Cr14Mn14Ni are tested. Tip forces including normal reaction and frictional forces caused by aerodynamic forces are quantitatively investigated under conditions with and without frictions using the torque balance principle and nonlinear beam theory (by ANSYS simulations), respectively. Torques, frictional heats, and the temperature distributions of the rotor and bristle pack are studied further. Details and characteristics of the flow and temperature distributions inside the bristle pack are presented. In the experiments, besides traditional tests, such as leakage and torque tests, an infrared camera is employed to capture temperature distributions at the interface of the rotor, bristle pack and nearby zones under various pressure differentials and rotation speeds. The threedimensional slice model is firstly verified by calculating the leakages, torques and temperature distributions of the brush seal and confirmed via experimentation. The influence of various frictional coefficients and pressure differentials on tip forces, torque and temperature distributions are also examined. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Theoretical and Experimental Investigation on Tip Forces and Temperature Distributions of the Brush Seal Coupled Aerodynamic Force | |
type | Journal Paper | |
journal volume | 136 | |
journal issue | 5 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.4026074 | |
journal fristpage | 52502 | |
journal lastpage | 52502 | |
identifier eissn | 0742-4795 | |
tree | Journal of Engineering for Gas Turbines and Power:;2014:;volume( 136 ):;issue: 005 | |
contenttype | Fulltext |