Empirical Performance Models for Axial-Flow Turbine Blade Rows

2006 ◽  
pp. 61-92
Keyword(s):  
Turbine Blade ◽  
Axial Flow ◽  
Performance Models ◽  
Empirical Performance

Part-Span Application of Sweep and Lean at Turbine Blade Tips: A Low Speed Experimental Cascade Study

2010 ◽  
Author(s):  
Bhaskar Roy ◽  
Anoop Prajapati
Keyword(s):  
Performance Improvement ◽  
Turbine Blade ◽  
Axial Flow ◽  
Turbine Rotor ◽  
Rotor Blades ◽  
Pressure Surface ◽  
Wall Boundary Layer ◽  
Performance Reduction ◽  
Application Potential ◽  
End Wall

This study is aimed at exploring the possibility of aerodynamic performance improvement by providing part-span forward sweep and lean near the tip regions of axial flow turbine rotor blades. Such aerodynamic benefits may have application potential in the uncooled LPT blades. The curved forward sweep and curved lean have been provided to 25% of the blade span near the tip in cascade, Three sets of cascades of the same turbine airfoil have been studied — (i) straight blades, (ii) part span swept blades and (iii) part span leaned blades. The cascade results show that swept blade gives a recovery of 20–25% loss in blade performance near the tip region at 0° and 10° incidences. The swept and leaned blades suppress the Cp perturbations (as seen in straight blades) at 0° and at 10° incidences, on the suction surfaces of turbine blade cascades. Comparatively the leaned blades show blade unloading, largely on the pressure surface, which leads to some performance reduction. The wake loss study shows reduction in wake losses for swept turbine blade at near tip region. The end-wall boundary layer measurements across the open tips demonstrate some aerodynamic improvement, near the tip regions, for parts-span swept and leaned blades.

High Temperature Turbine Researches at National Aerospace Laboratory in Japan

1974 ◽  
Author(s):  
K. Takahara ◽  
M. Sasaki ◽  
M. Minoda ◽  
A. Yamamoto ◽  
H. Nouse ◽  
...  
Keyword(s):  
High Temperature ◽  
Turbine Blade ◽  
Film Cooling ◽  
High Speed ◽  
Turbine Blades ◽  
Axial Flow ◽  
Leading Edge ◽  
Performance Estimation ◽  
New Construction ◽  
Full Scale Tests

This paper reviews the basic researches of high temperature turbines. These researches include: the performance estimation of a turbo-fan engine with an air-cooled turbine; the relation between the spanwise distribution of cooling effectiveness and the life of the air-cooled turbine blade; experiments of film cooling on the leading edge and on the reduction of unsteady thermal stress in the air-cooled turbine blade; and a new construction of the air-cooled turbine blade. Also discussed are the two-dimensional cascade tests of air-cooled turbine blades by the low-speed and high-speed wind tunnels. Full-scale tests for the high temperature turbine including aerodynamic and thermodynamic investigations of air-cooled axial flow turbines are shown.

Empirical performance models of hot in-place recycling of asphalt pavements

2016 ◽  
Vol 18 (12) ◽  
pp. 1081-1088 ◽  
Author(s):  
Bin Yu ◽  
Qiang Liu ◽  
Xin Tian ◽  
Lan Zhou ◽  
Mei Lin
Keyword(s):  
Asphalt Pavements ◽  
Performance Models ◽  
Empirical Performance

Empirical performance models for 3T1D memories

2009 ◽  
Author(s):  
Kristen Lovin ◽  
Benjamin C. Lee ◽  
Xiaoyao Liang ◽  
David Brooks ◽  
Gu-Yeon Wei
Keyword(s):  
Performance Models ◽  
Empirical Performance
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