Topic
Axial compressor
About: Axial compressor is a research topic. Over the lifetime, 12035 publications have been published within this topic receiving 127766 citations.
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Patent•
16 Jun 1993
TL;DR: In this paper, a process and a device for detecting fouling of an axial compressor by measuring the pressure fluctuations within at least one of the stages (12, 14) of the compressor (10) in the region of a compressor housing (24) by means of a pressure sensing device (32) was presented.
Abstract: A process and a device for detecting fouling of an axial compressor (10) by measuring the pressure fluctuations within at least one of the stages (12, 14) of the compressor (10) in the region of the compressor housing (24) by means of at least one pressure sensing device (32), deriving a frequency signal from the signals delivered from the pressure sensing device (32), checking whether each of the frequency signals comprises at least one characteristic peak (70) in the region of a characteristic frequency assigned to one of the compressor stages (12, 14), and deriving a fouling parameter from the frequency signal which depends on a peak parameter indicative of the form of the characteristic peak (70) and indicating the status of fouling of the compressor.
52 citations
Patent•
24 Aug 1988
TL;DR: In this paper, an aerodynamic buffer zone in the gap between the tip of an axial flow turbine blade of a gas turbine engine and its surrounding shroud or seal (outer air seal) is created by discretely discharging a high velocity stream of cooling air from the tip in a judicious direction.
Abstract: An aerodynamic buffer zone in the gap between the tip of an air cooled axial flow turbine blade of a gas turbine engine and its surrounding shroud or seal (outer air seal) is created by discretely discharging a high velocity stream of cooling air from the tip of the blade in a judicious direction. The stream is angularly oriented relative to the plane of rotation of the turbine so that it is discharged in the gap in the direction of the pressure side of the turbine and preferably at between a 15°-45° angle relative to the flat surface of the tip of the blade.
52 citations
TL;DR: In this paper, the axial spacing between the stator and rotor was reduced in a transonic compressor rig, and mass flow rate, pressure ratio, and efficiency all decreased as axial spacings between the rotor and stator were reduced.
Abstract: Usually less axial spacing between the blade rows of an axial flow compressor is associated with improved efficiency. However, mass flow rate, pressure ratio, and efficiency all decreased as the axial spacing between the stator and rotor was reduced in a transonic compressor rig. Reductions as great as 3.3% in pressure ratio and 1.3 points of efficiency were observed as axial spacing between the blade-rows was decreased from far apart to close together. The number of blades in the stator blade-row also affected stage performance. Higher stator blade-row solidity led to larger changes in pressure ratio, efficiency, and mass flow rate with axial spacing variation. Analysis of the experimental data suggests that the drop in performance is a result of increased loss production due to blade-row interactions. Losses in addition to mixing loss are present when the blade-rows are spaced closer together. The extra losses are associated with the upstream stator wakes and are most significant in the mid-span region of the flow.Copyright © 2002 by ASME
52 citations
Patent•
21 Apr 1992
TL;DR: In this paper, an overheating prevention method for a fixed displacement type compressor has been proposed for introducing a part of high pressure liquefied coolant in a compressor of a refrigeration cycle, into a compression chamber maintained under a compression stroke of the compressor through a connecting pipe, and for controlling a flow rate of the liquid coolant flowing through the communication pipe to thereby cool the compressor.
Abstract: An overheating prevention method for a fixed displacement type compressor having an overheating prevention device for introducing a part of high pressure liquefied coolant, liquefied in a compressor of a refrigeration cycle, into a compression chamber maintained under a compression stroke of the compressor through a connecting pipe, and for controlling a flow rate of the liquefied coolant flowing through the communication pipe to thereby cool the compressor. The connecting pipe is communicated with the compressor so that an average pressure within the compressor is reduced relative to a condensed pressure under a minimum operational pressure ratio condition at which the introduction of the liquefied coolant is required for cooling the compressor, within an operational pressure range in which the condensed pressure and evaporation pressure are respectively variable. The high pressure liquefied coolant may be introduced into the compression chamber, kept under the compression stroke, from a plurality of positions.
52 citations
52 citations