Flow Characteristics of Curved Rotor Stator Systems Using Large Eddy Simulation
In this paper, the new idea of application of a curved rotor disk in rotor stator systems is presented and analyzed by using the large eddy simulation technique. The geometry of the examined rotor-stator system consists of a stationary flat disk (stator), a rotating curved disk (rotor) and a station...
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| Veröffentlicht in: | Flow, turbulence and combustion turbulence and combustion, 2019-06, Vol.103 (1), p.111-140 |
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| container_title | Flow, turbulence and combustion |
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| creator | Damavandi, Mohammad Darvish Nejat, Amir |
| description | In this paper, the new idea of application of a curved rotor disk in rotor stator systems is presented and analyzed by using the large eddy simulation technique. The geometry of the examined rotor-stator system consists of a stationary flat disk (stator), a rotating curved disk (rotor) and a stationary enclosing cylinder (shroud). A hole in the center of stator allows the flow to enter the cavity, and the clearance between the shroud and rotor enables the flow to exit the cavity. Employing elliptical bumps with different geometrical parameters on the rotor disk (creating a curvature on the rotor), the rotating curved disk is parametrized. Three cavity cases (one with a flat rotor disk, another with the maximum outflow total pressure, and the third with the highest mass flow rate) are selected for LES analysis and more detailed investigation of flow and turbulence structures. The Favre-filtered governing equations for LES analysis of compressible turbulent flows are solved for all three cases. Radial and circumferential flow velocities as well as shear and normal Reynolds stresses in different cavity regions are studied. The flow in a rotor-stator cavity is simultaneously affected by the inlet flow, rotor rotation, and the bump on rotor disk. Creating a bump on rotor disk causes increase of both the radial pressure gradient and the mass flow rate of fluid that enters the rotor-stator cavity. |
| doi_str_mv | 10.1007/s10494-018-0001-9 |
| format | Article |
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The geometry of the examined rotor-stator system consists of a stationary flat disk (stator), a rotating curved disk (rotor) and a stationary enclosing cylinder (shroud). A hole in the center of stator allows the flow to enter the cavity, and the clearance between the shroud and rotor enables the flow to exit the cavity. Employing elliptical bumps with different geometrical parameters on the rotor disk (creating a curvature on the rotor), the rotating curved disk is parametrized. Three cavity cases (one with a flat rotor disk, another with the maximum outflow total pressure, and the third with the highest mass flow rate) are selected for LES analysis and more detailed investigation of flow and turbulence structures. The Favre-filtered governing equations for LES analysis of compressible turbulent flows are solved for all three cases. Radial and circumferential flow velocities as well as shear and normal Reynolds stresses in different cavity regions are studied. The flow in a rotor-stator cavity is simultaneously affected by the inlet flow, rotor rotation, and the bump on rotor disk. 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The geometry of the examined rotor-stator system consists of a stationary flat disk (stator), a rotating curved disk (rotor) and a stationary enclosing cylinder (shroud). A hole in the center of stator allows the flow to enter the cavity, and the clearance between the shroud and rotor enables the flow to exit the cavity. Employing elliptical bumps with different geometrical parameters on the rotor disk (creating a curvature on the rotor), the rotating curved disk is parametrized. Three cavity cases (one with a flat rotor disk, another with the maximum outflow total pressure, and the third with the highest mass flow rate) are selected for LES analysis and more detailed investigation of flow and turbulence structures. The Favre-filtered governing equations for LES analysis of compressible turbulent flows are solved for all three cases. Radial and circumferential flow velocities as well as shear and normal Reynolds stresses in different cavity regions are studied. The flow in a rotor-stator cavity is simultaneously affected by the inlet flow, rotor rotation, and the bump on rotor disk. Creating a bump on rotor disk causes increase of both the radial pressure gradient and the mass flow rate of fluid that enters the rotor-stator cavity.</description><subject>Automotive Engineering</subject><subject>Compressibility</subject><subject>Curvature</subject><subject>Cylinders</subject><subject>Engineering</subject><subject>Engineering Fluid Dynamics</subject><subject>Engineering Thermodynamics</subject><subject>Flow characteristics</subject><subject>Flow control</subject><subject>Fluid dynamics</subject><subject>Fluid flow</subject><subject>Fluid- and Aerodynamics</subject><subject>Heat and Mass Transfer</subject><subject>Inlet flow</subject><subject>Large eddy simulation</subject><subject>Mass flow rate</subject><subject>Outflow</subject><subject>Rotating cylinders</subject><subject>Rotating disks</subject><subject>Rotation</subject><subject>Stators</subject><subject>Turbulence</subject><subject>Turbulent flow</subject><subject>Vortices</subject><issn>1386-6184</issn><issn>1573-1987</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNp1kE1LAzEQhoMoWKs_wFvAczSTZL-OsrQqLBSsPYc0ydYt7aYmWaX_3tQVPHmaYXjed-BB6BboPVBaPASgohKEQkkopUCqMzSBrOAEqrI4Tzsvc5JDKS7RVQjbxOQFrSZoMd-5L1y_K690tL4LsdMBuxbXg_-0Br-66DxeRvUzjiHafcCr0PUb3Ci_sXhmzBEvu_2wU7Fz_TW6aNUu2JvfOUWr-eytfibN4umlfmyI5hmPxBjT0gx4pjkYJrQFmhvGGedCM8HyvDXUZIXR61ZlWamEKKyFtQbOWbpQPkV3Y-_Bu4_Bhii3bvB9eikZ47RkJQORKBgp7V0I3rby4Lu98kcJVJ68ydGbTN7kyZusUoaNmZDYfmP9X_P_oW8ddW-q</recordid><startdate>20190601</startdate><enddate>20190601</enddate><creator>Damavandi, Mohammad Darvish</creator><creator>Nejat, Amir</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20190601</creationdate><title>Flow Characteristics of Curved Rotor Stator Systems Using Large Eddy Simulation</title><author>Damavandi, Mohammad Darvish ; Nejat, Amir</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c353t-dddf05135c31d24ce106d232334c24266fd0d57dcbfa558a447ee1bc1332fa503</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Automotive Engineering</topic><topic>Compressibility</topic><topic>Curvature</topic><topic>Cylinders</topic><topic>Engineering</topic><topic>Engineering Fluid Dynamics</topic><topic>Engineering Thermodynamics</topic><topic>Flow characteristics</topic><topic>Flow control</topic><topic>Fluid dynamics</topic><topic>Fluid flow</topic><topic>Fluid- and Aerodynamics</topic><topic>Heat and Mass Transfer</topic><topic>Inlet flow</topic><topic>Large eddy simulation</topic><topic>Mass flow rate</topic><topic>Outflow</topic><topic>Rotating cylinders</topic><topic>Rotating disks</topic><topic>Rotation</topic><topic>Stators</topic><topic>Turbulence</topic><topic>Turbulent flow</topic><topic>Vortices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Damavandi, Mohammad Darvish</creatorcontrib><creatorcontrib>Nejat, Amir</creatorcontrib><collection>CrossRef</collection><jtitle>Flow, turbulence and combustion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Damavandi, Mohammad Darvish</au><au>Nejat, Amir</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Flow Characteristics of Curved Rotor Stator Systems Using Large Eddy Simulation</atitle><jtitle>Flow, turbulence and combustion</jtitle><stitle>Flow Turbulence Combust</stitle><date>2019-06-01</date><risdate>2019</risdate><volume>103</volume><issue>1</issue><spage>111</spage><epage>140</epage><pages>111-140</pages><issn>1386-6184</issn><eissn>1573-1987</eissn><abstract>In this paper, the new idea of application of a curved rotor disk in rotor stator systems is presented and analyzed by using the large eddy simulation technique. The geometry of the examined rotor-stator system consists of a stationary flat disk (stator), a rotating curved disk (rotor) and a stationary enclosing cylinder (shroud). A hole in the center of stator allows the flow to enter the cavity, and the clearance between the shroud and rotor enables the flow to exit the cavity. Employing elliptical bumps with different geometrical parameters on the rotor disk (creating a curvature on the rotor), the rotating curved disk is parametrized. Three cavity cases (one with a flat rotor disk, another with the maximum outflow total pressure, and the third with the highest mass flow rate) are selected for LES analysis and more detailed investigation of flow and turbulence structures. The Favre-filtered governing equations for LES analysis of compressible turbulent flows are solved for all three cases. Radial and circumferential flow velocities as well as shear and normal Reynolds stresses in different cavity regions are studied. The flow in a rotor-stator cavity is simultaneously affected by the inlet flow, rotor rotation, and the bump on rotor disk. Creating a bump on rotor disk causes increase of both the radial pressure gradient and the mass flow rate of fluid that enters the rotor-stator cavity.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10494-018-0001-9</doi><tpages>30</tpages></addata></record> |
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| identifier | ISSN: 1386-6184 |
| ispartof | Flow, turbulence and combustion, 2019-06, Vol.103 (1), p.111-140 |
| issn | 1386-6184 1573-1987 |
| language | eng |
| recordid | cdi_proquest_journals_2230828214 |
| source | SpringerLink Journals - AutoHoldings |
| subjects | Automotive Engineering Compressibility Curvature Cylinders Engineering Engineering Fluid Dynamics Engineering Thermodynamics Flow characteristics Flow control Fluid dynamics Fluid flow Fluid- and Aerodynamics Heat and Mass Transfer Inlet flow Large eddy simulation Mass flow rate Outflow Rotating cylinders Rotating disks Rotation Stators Turbulence Turbulent flow Vortices |
| title | Flow Characteristics of Curved Rotor Stator Systems Using Large Eddy Simulation |
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