Axial compressor

About: Axial compressor is a research topic. Over the lifetime, 12035 publications have been published within this topic receiving 127766 citations.

Turbomachine with removable stator vane

Abstract: An axial flow compressor or turbine includes a stator case with a plug which is removable from outside the case, together with one or more stator vanes attached to the plug, to provide access to an adjacent part of the rotor. Such access may be used to add balance weights to the rotor as part of a rotor balancing procedure, or for inspection of rotor blades.

Curved heat exchanger with low frontal area tube passes

Abstract: A curved heat exchanger for a vehicle has tubes generally sector shaped in cross section and arranged in an arcuate pattern to transmit heat exchanger fluid between laterally spaced tanks. One embodiment has discrete heat exchanger fluid sections respectively connected to a vehicle engine, torque converter transmission and between the air conditioner compressor and evaporator. The tubes are tilted to align air passages therebetween with the radial direction of air flow discharged from an interior fan so that there is improved fan-heat exchanger matching resulting in reduced separation of air from the surfaces of the heat exchanger tubes and turbulence in the air passages. The side walls of adjacent tubes are equally spaced from one another to receive standard width air centers therebetween. The tubes may have discrete inner and outer flow sections insulated from one another and respectively employed to conduct engine coolant and another heat exchanger fluid such as for the air conditioning system. This invention features air pressure drop through the core so that a low horse power motor drive can be effectively utilized to pump cooling air through the heat exchanger. In another embodiment of the invention, axial flow fans are mounted at the ends of the cylindrical heat exchanger.

Simulation of flow generated by an axial-flow impeller: Batch and continuous operation

Abstract: It is important to extend and to validate computational flow models to simulate continuous operation of stirred vessels and to capture possible interaction of feed inlet/outlet with the flow generated by impellers. In the present work, we have developed and used a computational model to understand the flow generated by an axial flow impeller in a batch and a continuously operated baffled vessel. A multiple reference frames approach was used to simulate flow generated by the Mixel TT impeller in stirred vessel. The predicted velocity results show reasonably good agreement (qualitative as well as quantitative) with the experimental data. Characteristics of flow around blades of Mixel TT were studied using the computational model. The computational model was extended to simulate flow and mixing in a continuous operation. Simulations were carried out to understand the interaction of the jet emanating from the feed pipe and the flow generated by the impeller. Model predictions were compared with published experimental data, obtained by laser Doppler velocimetry. The differences and similarities between batch and continuous operation are highlighted. Mixing simulations were carried out to examine possible short-circuiting and non-ideal behaviour of the continuous operation of the stirred vessel. Influence of the impeller speed, feed rate and location of inlet/outlet on mixing and on the extent of non-ideality of flow was studied. The computational model and results discussed in this work will be useful for understanding the mixing process in continuous-flow stirred vessels.

Experimental Research on Aerodynamic Performance and Exit Flow Field of Low Pressure Axial Flow Fan with Circumferential Skewed Blades

Abstract: In this article, the low pressure axial flow fan with circumferential skewed rotor blade, including the radial blade, the forward-skewed blade and the backward-skewed blade, was studied with experimental methods. The aerodynamic performance of the rotors was measured. At the design condition at outlet of the rotors, detailed flow measurements were performed with a five-hole probe and a Hot-Wire Anemometer (HWA). The results show that compared to the radial rotor, the forward-skewed rotor demonstrates a wider Stable Operating Range (SOR), is able to reduce the total pressure loss in the hub region and make main loading of blade accumulating in the mid-span region. There is a wider wake in the upper mid-span region of the forward-skewed rotor. Compared to the radial rotor, in the backward-skewed rotor there is higher total pressure loss near the hub and shroud regions and lower loss in the mid-span region. In addition, the velocity deficit in the wake is lower at mid-span of the backward-skewed rotor than the forward-skewed rotor.

Compressor Performance With Water Injection

Abstract: There has been renewed interest recently in the injection of water at inlet to gas turbine plants As is to be expected there is a drop in temperature at the inlet face to the compressor and this obviously has an effect on compressor performance But a second effect occurs within the early stages of the compressor itself, associated with an increase in the effective specific heat due to continuing evaporation of the water droplets Consequently there are movements away from design operating conditions on the stage characteristicsA one-dimensional analysis of compressor off-design performance is developed to illustrate these effects, which appear to be appreciable, even for very small quantities of water injectionCopyright © 2001 by ASME