Research into aero acoustic characteristics of two-row impellers of the axial compressor
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 2, Issue 8
Abstract
<p>We have conducted numerical simulation of current in the axial impellers with a single-row and a two-row geometrically equivalent blade crowns with a density of blade crowns over average radius of 1...2.5. The pressure characteristics of impellers obtained at q(λ)=0.45…0.8 show that using the two-row impellers can improve the pressure of a stage over the entire range of operation. Under the flow-around modes that correspond to the maximum pressure, the degree of pressure rise increases by 10.5 %. The research results showed that the two-row impellers demonstrate the higher level of losses compared with the level of losses in the equivalent single-row impellers. We have obtained results of research into aero acoustic characteristics of subsonic two-row impellers of the axial compressor.</p><p>The research results showed that the use of two-row blade crowns in the impeller makes it possible to reduce the level of acoustic pressure in the range of operation q(λ)=0.45…0.8 by 0.5 dB to 3.2 dB at a density of blade crowns over average radius of 1...2.5. The replacement of a single-row blade crown in the impeller of a stage of the axial compressor with the equivalent two-row blade crown could ensure the enhancement of aerodynamic loading on the stage and reduce acoustic emission of the compressor.</p>
Authors and Affiliations
Ekaterina Doroshenko, Yuriy Tereshchenko, Ivan Lastivka, Inna Kudzinovs'ka
Keywords
Related Articles
- EP ID EP527903
- DOI 10.15587/1729-4061.2018.125697
- Views 76
- Downloads 0
X-ray diagnostics of the structure of nearsurface layers of ionimplanted monocrystalline materials
A method for obtaining information on the distribution of the parameters of a crystalline structure in the thickness of a near-surface ion-implanted layer, types and characteristics of radiation defects (size, concentrat...
Method for determining the thickness of a binder layer at its non-uniform mass transfer inside the channel of a honeycomb filler made from polymeric paper
Sandwich panels with honeycomb filler based on polymer paper "Nomex" is widely used in crucial structures for various purposes. In the process of manufacturing such panels, some factors of the technological process, such...
Determining the influence of parameters for gas-air flows on the thermal process of producing iron ore pellets
<p>We present the results of the study on changes in temperature of gas-air flows at the outlets from calcination zones and recuperation zones of a conveyor-calcination plant. We determined the influence of these tempera...
Analysis of properties of epoxy compositions that operate in contact with water and oil products
<p>We modified epoxy resin-based polymer solutions to increase durability in aggressive environments and to reduce costs. We achieved the objective via filling them with the multifractional mineral frame and modification...
Forming a defective surface layer when cutting parts made from carbon-carbon and carbon-polymeric composites
<p class="papertitle">We report results of theoretical and experimental research aimed at establishing the mechanisms for the formation of a defective layer at the machined surfaces made from carbon composite materials,...