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•
09 May 1991
TL;DR: In this paper, the capacity variable range of the compressor can be increased with a simple structure including one counterflow checking means and one switching means, and the switching means is operated such that the refrigerant gas compressed by the second compressor is let to flow into the sealed casing to perform a parallel compression operation with use of the first and second compressor means.
Abstract: A refrigerating cycle apparatus has, in a sealed casing, a compressor including first and second compressor means driven simultaneously. A refrigerating cycle circuit is constituted by connecting this compressor, a condenser, a pressure-reducing device, and an evaporator. Counterflow checking means is provided on the suction side of the first compressor means, for checking the counterflow of the refrigerant from the first compressor means to the evaporator. Switching means is provided on the discharge side of the second compressor means. The switching means is operated such that the refrigerant gas compressed by the second compressor means is let to flow into the sealed casing to perform a parallel compression operation with use of the first and second compressor means, and the refrigerant gas compressed by the second compressor means is let to flow from the downstream side of the counterflow checking means to the suction side of the first compressor means, thereby performing a two-stage compression operation in which compression is performed first by the first compressor means and then by the second compressor means. The capacity variable range of the compressor can be increased with a simple structure including one counterflow checking means and one switching means.
44 citations
Patent•
13 May 1974TL;DR: In this paper, a supersonic centrifugal compressor comprises a rotor located in a housing having a fluid intake eye, and the fluid flows substantially radially with respect to the rotor into a stationary diffuser.
Abstract: A supersonic centrifugal compressor comprises a rotor located in a housing having a fluid intake eye. The fluid (air for instance) successively travels through an intake region wherein the rotor has a small number of blades which deflect the fluid tangentially by a small amount only, then through a compression region wherein the rotor has a higher number of blades producing tangential and meridian flow deflection. Last, the fluid flows substantially radially with respect to the rotor into a stationary diffuser.
44 citations
Patent•
01 Oct 1980
TL;DR: In this paper, a structure and method for providing cooling fluids from a compression section to a turbine section of an axially flow rotary machine is disclosed, which enables the machine to minimize the effect that unscheduled variations in the temperature of the cooling fluids have on operating clearances in the turbine section.
Abstract: OF THE DISCLOSURE A structure and method for providing cooling fluids from a compression section to a turbine section of an axially flow rotary machine is disclosed. Various construction details and steps of the method enable the machine to minimize the effect that un-scheduled variations in the temperature of the cooling fluids have on operating clearances in the turbine section. These unscheduled variations may result from changes in ambient temperature and component deterior-ation. An internal cooling fluid from the discharge region of the rearmost compressor is used to modulate the flow of a second fluid impinged on the exterior of the outer case for controlling the clearance between an array of rotor blades and a coolable stator shroud spaced radially outwardly of the rotor blades. In one embodiment, a valve for modulating the flow of the second fluid has at least one thermostatic bi-metallic spring for transducing a change in temperature into a displacement. The displacement changes the flow area Af between a valve head and a conical seat in the conduit for the second fluid through the valve.
44 citations
TL;DR: In this article, an experimental investigation of aerodynamic blade row interactions in the first stage of the four-stage Low-Speed Research Compressor of Dresden was presented, where the measurements were carried out on pressure side and suction side at midspan.
Abstract: This two-part paper presents experimental investigations of unsteady aerodynamic blade row interactions in the first stage of the four-stage Low-Speed Research Compressor of Dresden. Both the unsteady boundary layer development and the unsteady pressure distribution of the stator blades are investigated for several operating points. The measurements were carried out on pressure side and suction side at midspan. In part I of the paper the investigations of the unsteady boundary layer behaviour are presented. The experiments were carried out using surface-mounted hot-film sensors. Additional information on the time-resolved flow between the blade rows were obtained with a hot-wire probe. The unsteady boundary layer development is strongly influenced by the incoming wakes. Within the predominantly laminar boundary layer in the front part of the blade a clear response of the boundary layer to the velocity and turbulence structure of the incoming wakes can be observed. The time-resolved structure of the boundary layer for several operating points of the compressor is analyzed in detail. The topic “calmed regions”, which can be coupled to the wake passing, is discussed. As a result an improved description of the complex boundary layer structure is given.Copyright © 2003 by ASME
44 citations
TL;DR: In this article, the onset of flow instability in axial compressors operating with asymmetric inlet flow was investigated, and the authors showed that the stability of the flow in the compressor can be adversely affected if the temporal or spatial structure of the distortion is such that resonant type responses can be evoked either from the compressor or from compressor/compression system interactions.
44 citations