Journal ArticleDOI
Development of Taylor-Görtler Vortices Over the Pressure Surface of a Turbine Blade
Reads0
Chats0
TLDR
In this article, the authors used the naphthalene sublimation technique to investigate the development of Taylor-Gortler vortices over the pressure surface of a simulated high performance turbine blade.Abstract:
The naphthalene sublimation technique is used to investigate the development of Taylor-Gortler vortices over the pressure surface of a simulated high performance turbine blade. Large spanwise variation in mass transfer is observed downstream on the pressure surface in the two-dimensional flow region for cases with low freestream turbulence, indicating the existence of Taylor-Gortler vortices. Different average and local mass transfer rates for the same flow conditions suggest that roughness variation near the leading edge affects the initial formation of Taylor-Gortler vortices. Larger and more uniformly distributed roughness at the leading edge produces much stronger Taylor-Gortler vortices downstream and greatly enhances the mass transfer rate.read more
Citations
More filters
Journal ArticleDOI
Numerical Investigation of Contrasting Flow Physics in Different Zones of a High-Lift Low Pressure Turbine Blade
TL;DR: In this paper, the effect of the state of the incoming boundary layer on flow features has been investigated on the suction surface, pressure surface, and endwalls of a low-pressure turbine blade.
Journal ArticleDOI
Boundary layer transition over a concave surface caused by centrifugal instabilities
TL;DR: In this paper, the laminar-to-turbulent transition process over a concave surface is studied using direct numerical simulations (DNS), and it is found that the flow passing over such surface is highly susceptible to develop centrifugal instabilities in the form of Gortler vortices.
Journal ArticleDOI
Numerical heat transfer predictions and mass/heat transfer measurements in a linear turbine cascade
TL;DR: In this paper, the effect of secondary flows on mass transfer from a simulated gas turbine blade and hubwall is investigated using naphthalene sublimation, which provides non-dimensional mass transfer coefficients in the form of Sherwood numbers that can be converted to heat transfer coefficients through the use of an analogy.
Journal ArticleDOI
Heat-transfer analysis of a transitional boundary layer over a concave surface with Görtler vortices by means of direct numerical simulations
TL;DR: In this paper, the development of a thermal boundary layer during the laminar-to-turbulent transition process over a concave surface is studied, where the temperature variable is treated as a passive scalar.
Journal ArticleDOI
Effect of Inlet Skew on Heat/Mass Transfer From a Simulated Turbine Blade
TL;DR: In this paper, the effect of an inlet skew on a simulated gas-turbine blade placed in a linear cascade was studied. But the authors focused on a single turbine stage, where the transverse motion of a belt, placed parallel to and upstream of the turbine cascade, generates the skew.
References
More filters
Book
Experimentation and Uncertainty Analysis for Engineers
TL;DR: Experimentation, errors, and uncertainty: Experimental design, data analysis, regression, and reporting of results as discussed by the authors, and additional Considerations in Experimental Design. Planning an Experiment: General Uncertainty Analysis.
Journal ArticleDOI
A review of mass transfer measurements using naphthalene sublimation
Richard J Goldstein,H. H. Cho +1 more
TL;DR: The naphthalene sublimation method can be used to study mass and heat transfer with confidence for a variety of applications, but with certain restrictions as discussed by the authors, such as high-velocity flows.
Journal ArticleDOI
Local nonsimilarity boundary-layer solutions
TL;DR: In this article, a new solution method for nonsimilarity boundary layers, applicable locally and independently of information from other stream wise positions, is described and implemented, which is of the same type as those encountered in the treatment of similarity boundary layers.
Proceedings ArticleDOI
Effect of high freestream turbulence with large length scale on blade heat/mass transfer
TL;DR: In this article, the influence of high free-stream turbutence with large length scale on the heat/mass transfer from a turbine blade in a highly accelerated linear cascade was investigated.
Proceedings ArticleDOI
The Computation of Adjacent Blade-Row Effects in a 1.5 Stage Axial Flow Turbine
TL;DR: In this article, the numerical simulation of flow through a 1.5-stage axial flow turbine with 3-row configuration has been conducted at the University of Aachen where measurements behind the first vane, the first stage and the full configuration were taken.