Numerical model validation and prediction of mist/steam cooling in a 180-degree bend tube

Gas turbine performance is closely linked to the turbine inlet temperature, which is limited by the turbine guide vanes ability to withstand the massive thermal loads. Thus, steam cooling has been introduced as an advanced cooling technology to improve the efficiency of modern high-temperature gas turbines. This study compares the cooling performance of compressed air and steam in the renowned radially cooled NASA C3X turbine guide vane, using a numerical model. The conjugate heat transfer (CHT) model is based on the RANS-method, where the shear stress transport (SST) k−ω model is selected to predict the effects of turbulence. The numerical model is validated against experimental pressure and temperature distributions at the external surface of the vane. The results are in good agreement with the experimental data, with an average error of 1.39% and 3.78%, respectively. By comparing the two coolants, steam is confirmed as the superior cooling medium. The disparity between the coolants increases along the axial direction of the vane, and the total volume average temperature difference is 30 K. Further investigations are recommended to deal with the local hot-spots located near the leading- and trailing edge of the vane.

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A child seat numerical model validation in the static and dynamic work conditions

Archives of Civil and Mechanical Engineering ◽

10.1016/j.acme.2014.07.001 ◽

2015 ◽

Vol 15 (2) ◽

pp. 361-375 ◽

Cited By ~ 20

Author(s):

P. Baranowski ◽

K. Damaziak ◽

J. Malachowski ◽

L. Mazurkiewicz ◽

A. Muszyński

Keyword(s):

Numerical Model ◽

Model Validation ◽

Work Conditions ◽

Dynamic Work ◽

Static And Dynamic Work

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High temperature metal hydrides for energy systems Part A: Numerical model validation and calibration

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2017.05.062 ◽

2017 ◽

Vol 42 (25) ◽

pp. 16195-16202 ◽

Cited By ~ 8

Author(s):

Marco Gambini ◽

Tommaso Stilo ◽

Michela Vellini ◽

Roberto Montanari

Keyword(s):

High Temperature ◽

Numerical Model ◽

Model Validation ◽

Metal Hydrides ◽

Energy Systems

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Empirical determination of the mechanical properties of Vacuum Packed Particles

MATEC Web of Conferences ◽

10.1051/matecconf/201925405008 ◽

2019 ◽

Vol 254 ◽

pp. 05008 ◽

Cited By ~ 1

Author(s):

Piotr Bartkowski ◽

Robert Zalewski

Keyword(s):

Mechanical Properties ◽

Numerical Model ◽

Model Validation ◽

Experimental Test ◽

Empirical Determination ◽

Validation Procedure

In this work the experimental test of Vacuum Packed Particles (VPP) under 3-point bending are presented. VPP it is the structure compose of grains inside the plastomer coating. When the pressure inside is equal or higher than zero structure behave like a liquid, otherwise like a elasto-plastic solid. Three types of grain material and different values of underpressure were tested. Results presented in this paper will be used in the further work for the numerical model validation procedure.

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