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Axial Hole Air-Entraining Cooling Technique of Radial-Flow Turbines
In response to the continually increasing thermal load caused by the rising gas temperature in the inlet of radial-flow turbines, this paper proposes...
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A study on the rotational effect of a stepped labyrinth seal according to the casing type
This paper presents the leakage characteristics of stepped labyrinth seals, considering the impact of rotation in the circumferential direction. Two...
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Numerical investigations into the rubbing wear behavior of honeycomb seal
The rubbing wear behavior of the honeycomb land against labyrinth fin was investigated with finite-element-analysis method at a range of incursion...
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Numerical analysis of the effect of different positions of circumferential grooves casing treatment on the stability expansion of mixed flow pumps
Aimed at achieving stable operation of mixed flow pumps, circumferential grooves casing treatment is adopted and its effect on stability expansion is...
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Optimization of a nozzle vane of gas turbine pre-swirl system
Gas turbine pre-swirl systems has been known to provide smooth cooling air to rotating turbine blades for prevention of thermal damage caused by high...
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Influence of Purge Ejection Angles and Upstream Wakes/Disturbances on Low Aspect Ratio Turbine Blade Passage Aerodynamics
The blade passage aerodynamics of turbine engine can be affected significantly by the purge flow—mainstream interaction. In this paper, aerodynamic...
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Effect of fillet radius of receiver hole on the performance of gas turbine pre-swirl system
Since the main flow blades of gas turbines are in high temperature and high pressure condition, their life span depends on the performance of the...
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Experimental and Computational Investigation on Film Cooling Effectiveness of Turbine Stator Blade
Gas turbine blades are subjected to high inlet temperatures, Due to the inherently non-uniform temperature of flow at the combustor exit, which...
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Investigation of axial spacing effect on noise radiation generated by rotor-stator interaction
The effect of axial spacing on tonal noise generated by rotor-stator interaction is numerically investigated. In the present hybrid method, acoustic...
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Analysis and design of centrifugal compressor for 10 MWe supercritical CO2 Brayton cycles
The concept of a closed-loop s-CO 2 Brayton cycle is highly attractive and promising; however, there is yet a major hurdle to overcome, namely, the...
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Effects of pin-fins with trapezoidal endwall on heat transfer characteristics in gas turbine blade internal cooling channels
All the studies about pin-fins so far focus on investigating the geometry and configurations of pin-fins to perceive the mechanism of the flow and...
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Studies on V-shaped flow control devices to improve film cooling effectiveness for air-cooled turbines
Demand for highly efficient gas turbine systems has been increasing TIT (turbine inlet temperature) and this trend will continue for forthcoming...
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Aerodynamic performance of high-lift blades in low-pressure turbines with periodic upstream wakes
The aerodynamic performance of high-lift blades was experimentally investigated at different Reynolds numbers ranging from 0.8×10 5 to 1.8×10 5 ....
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A novel, reduced-order optimization method for nonlinear model correction of turboshaft engines
Turboshaft engines are different from each other due to manufacturing and installation tolerances. Hence, it is difficult to draw out the physical...
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Superposition effect of the laidback fan-shaped film cooling hole on a gas turbine vane
The superposition effect of optimized laidback fan-shaped film cooling holes on a vane was experimentally investigated. The film cooling experiments...
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Numerical study on the leakage characteristics of a stepped labyrinth seal with mixed honeycomb cell diameters
As the performance improvement of gas turbines becomes marginal, it is required to develop a seal geometry that can reduce unwanted leakage more...
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Reduction of heat transfer and improvement of film cooling effect on squealer tip with multi-rib design concept
A multi-rib design concept was proposed to reduce the heat transfer and enhance film cooling effect on squealer tip. Three different shapes of ribs...
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Effects of geometric parameters of a staggered labyrinth seal on leakage flow
Staggered labyrinth seals are used in gas turbines for cooling turbine blades. In this study, numerical analyses were performed to evaluate the...
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Influence of flow coefficient on unsteady impeller loading induced by impeller-diffuser interaction
Unsteady Reynolds-averaged Navier-Stokes (URANS) simulation has been conducted to investigate how the flow coefficient affects unsteady impeller...
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Effect of Moving Endwall on Hub Leakage Flow of Cantilevered Stator in a Linear Compressor Cascade
The cantilevered stator has the advantages of reducing mass and axial length of highly loaded compressor. The details of the hub leakage flow...