Author: I. N. Moyle
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Stator Relative, Rotor Blade-to-blade Near Wall Flow in a Multi-stage Axial Compressor with Tip Clearance Variation
ASME Technical Papers
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 428
Book Description
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 428
Book Description
93-2350 - 93-2399
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 710
Book Description
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 710
Book Description
Applied Mechanics Reviews
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 1072
Book Description
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 1072
Book Description
Paper
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 558
Book Description
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 558
Book Description
International Aerospace Abstracts
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1042
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1042
Book Description
The Finding Guide to AIAA Meeting Papers
Author: American Institute of Aeronautics and Astronautics. Technical Information Service
Publisher:
ISBN:
Category : AIAA paper
Languages : en
Pages : 196
Book Description
Publisher:
ISBN:
Category : AIAA paper
Languages : en
Pages : 196
Book Description
Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 300)
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 686
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 686
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1338
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1338
Book Description
Effects of Rotor Tip Blade Loading Variation on Compressor Stage Performance
Author: Aniwat Tiralap
Publisher:
ISBN:
Category :
Languages : en
Pages : 119
Book Description
Changes in loss generation associated with altering the rotor tip loading of an embedded compressor stage is assessed. Steady and unsteady three-dimensional computations, complemented by control volume analyses, for varying rotor tip loading distributions provided results for determining if aft-loading rotor tip would yield a stage performance benefit in terms of a reduction in loss generation. Aft-loading rotor blade tip yields a relatively less-mixed-out tip leakage flow at the rotor exit and a reduction in overall tip leakage mass flow hence a lower loss generation; however, the attendant changes in tip flow angle distribution are such that there is an overall increase in the flow angle mismatch between tip flow and main flow leading to higher loss generation. The latter outweighs the former so that rotor passage loss from aft-loading rotor tip is marginally higher unless a constraint is imposed on tip flow angle distribution so that associated induced loss is negligible; a potential strategy for achieving this is proposed. In the course of assessing the benefit from unsteady tip leakage flow recovery in the downstream stator, it was determined that tip clearance flow is inherently unsteady with a time-scale distinctly different from the blade passing time. The disparity between the two timescales: (i) defines the periodicity of the unsteady rotor-stator flow, which is an integral multiple of blade passing time; and (ii) causes tip leakage vortex to enter the downstream stator at specific pitchwise locations for different blade passing cycles, which is a tip leakage flow phasing effect. Because of an inadequate grid resolution defining the unsteady interaction of tip flow with downstream stator, the benefit from unsteady tip flow recovery is the lower bound of its actual benefit. A revised design hypothesis is thus as follows: "rotor should be tip-aft-loaded and hub-fore-loaded while stator should be hub-aft-loaded and tip-fore-loaded with tip/hub leakage flow angle distribution such that it results in no additional loss". For the compressor stage being assessed here, an estimated 0.15% enhancement in stage efficiency is possible from aft-loading rotor tip only.
Publisher:
ISBN:
Category :
Languages : en
Pages : 119
Book Description
Changes in loss generation associated with altering the rotor tip loading of an embedded compressor stage is assessed. Steady and unsteady three-dimensional computations, complemented by control volume analyses, for varying rotor tip loading distributions provided results for determining if aft-loading rotor tip would yield a stage performance benefit in terms of a reduction in loss generation. Aft-loading rotor blade tip yields a relatively less-mixed-out tip leakage flow at the rotor exit and a reduction in overall tip leakage mass flow hence a lower loss generation; however, the attendant changes in tip flow angle distribution are such that there is an overall increase in the flow angle mismatch between tip flow and main flow leading to higher loss generation. The latter outweighs the former so that rotor passage loss from aft-loading rotor tip is marginally higher unless a constraint is imposed on tip flow angle distribution so that associated induced loss is negligible; a potential strategy for achieving this is proposed. In the course of assessing the benefit from unsteady tip leakage flow recovery in the downstream stator, it was determined that tip clearance flow is inherently unsteady with a time-scale distinctly different from the blade passing time. The disparity between the two timescales: (i) defines the periodicity of the unsteady rotor-stator flow, which is an integral multiple of blade passing time; and (ii) causes tip leakage vortex to enter the downstream stator at specific pitchwise locations for different blade passing cycles, which is a tip leakage flow phasing effect. Because of an inadequate grid resolution defining the unsteady interaction of tip flow with downstream stator, the benefit from unsteady tip flow recovery is the lower bound of its actual benefit. A revised design hypothesis is thus as follows: "rotor should be tip-aft-loaded and hub-fore-loaded while stator should be hub-aft-loaded and tip-fore-loaded with tip/hub leakage flow angle distribution such that it results in no additional loss". For the compressor stage being assessed here, an estimated 0.15% enhancement in stage efficiency is possible from aft-loading rotor tip only.