This paper presents the results of stator clocking investigations at a design point and an operating point near the stability limit in a low-speed research compressor (LSRC). The unsteady flow field of the LSRC at several clocking configurations was investigated using a three-dimensional unsteady, viscous solver. The unsteady pressure on the rotor blades at midspan (MS) was measured using time-resolving piezoresistive miniature pressure transducers. The effect of clocking on the unsteady pressure fluctuation at MS on the rotor blades is discussed for different operating points. Based on the unsteady profile pressures, the blade pressure forces were calculated. The peak-to-peak amplitudes of the unsteady blade pressure forces are presented and analysed for different clocking positions at both the design point and the operating point near the stability limit of the compressor.
DorneyD. J.SharmaO. P.Gundy-BurletK. L.Physics of airfoil clocking in a high-speed axial compressor. ASME paper 98-GT-082, 1998.
2.
ArnoneA.MarconciniM.PaccianiR.SchipaniC.SpanoE.Numerical investigation of airfoil clocking in a three-stage low-pressure turbine. ASME, J. Turbomach., 2002, 124(1), 61–68.
3.
BarankiewiczW. S.HathawayM. D.Effects of stator indexing on performance in a low speed multistage axial compressor. ASME paper 97-GT-496, 1997.
4.
ReinmoellerU.StephanB.SchmidtS.NiehuisR.Clocking effects in a 1.5 stage axial turbine-steady and unsteady experimental investigations supported by numerical simulations. ASME, J. Turbomach., 2002, 124(1), 52–60.
5.
ArnoneA.MarconciniM.GrecoA. S. D.SpanoE.Numerical investigation of three-dimensional clocking effects in a low pressure turbine. ASME, J. Turbomach., 2004, 126(3), 375–384.
6.
BohnD.RenJ.SellM.Influence of stator clocking on the unsteady three-dimensional flow in a two-stage turbine. ASME, J. Turbomach., 2005, 127(1), 156–163.
7.
CizmasP. G. A.DorneyD. J.The influence of clocking on unsteady forces of compressor and turbine blades. ISABE paper 99-7231, 1999.
8.
HsuS. T.WoA. M.Reduction of unsteady blade loading by beneficial use of vortical and potential disturbances in an axial compressor with rotor clocking. ASME, J. Turbomach., 1998, 120(4), 705–713.
9.
LeeY.FengJ.Potential and viscous interactions for a multi-blade-row compressor. ASME, J. Turbomach., 2004, 126(4), 464–472.
10.
HaldemanC. W.KrumanakerM. L.DunnM. G.Influence of clocking and vane/blade spacing on the unsteady surface pressure loading for a modern stage and one-half transonic turbine. ASME, J. Turbomach., 2003, 125(4), 743–753.
11.
MailachR.VogelerK.Rotor-stator interactions in a four-stage low-speed axial compressor-part I: Unsteady profile pressures and the effect of clocking. ASME, J. Turbomach., 2004, 126(4), 507–518.
12.
JiaH. X.VogelerK.Effect of clocking on the unsteady rotor blade loading in a 1.5-stage low-speed axial compressor. ASME paper GT2007–27237, 2007.
13.
DorneyD. J.SondakD. L.CizmasP. G. A.SarenV. E.SavinN. M.Full-annulus simulations of airfoil clocking in a compressor at off-design operating conditions. AIAA paper 99–2383, 1999.
14.
SauerH.BernsteinW.BernhardH.BiesingerT.BoosP.MöckelH.Konstruktion, Fertigung und Aufbau eines Verdichterprüfstandes und Aufnahme des Versuchsbetriebes an einem Niedergeschwindigkeits-Axialverdichter in Dresden. Abschluβbericht zum BMBF-Vorhaben 0326758A, Dresden, Germany, 1996.
15.
MüllerR.MailachR.LehmannI.The design and construction of a four-stage low-speed research compressor. In Proceedings of the IMP 97 Conference on Modelling and Design in Fluid-Flow Machinery, Gdansk, Poland, 1997, pp. 523–530.
16.
BoosP.MöckelH.HenneJ. M.SelmeierR.Flow measurement in a multistage large scale low speed axial flow research compressor. ASME paper 98-GT-432, 1998.
17.
BaldwinB.LomaxH.Thin layer approximation and algebraic model for separated turbulent flows. AIAA paper 78–257, 1978.
18.
JamesonA.SchmidtW.TurkelK. E.Numerical solutions of the Euler equations by finite volume methods using Runge-Kutta time-stepping schemes. AIAA paper 81–1259, 1981.
19.
JamesonA.Time dependent calculations using multigrid, with applications to unsteady flows past airfoils and wings. AIAA paper 91–1596, 1991.
20.
ArnoneA.PaccianiR.Rotor-stator interaction analysis using the Navier-Stokes equations and a multigrid method. ASME, J. Turbomach., 1996, 118(4), 679–689.
21.
MailachR.MüllerL.VogelerK.Rotor-stator interactions in a four-stage low-speed axial compressor - part II: Unsteady aerodynamic forces of rotor and stator blades. ASME, J. Turbomach., 2004, 126(4), 519–526.
22.
JiaH. X.VogelerK.MüllerL.MailachR.Numerical investigation of rotor-stator interactions in a 1.5-stage low-speed axial compressor. In the Conference on Modelling Fluid Flow (CMFF1906), Budapest, Hungary, 2006, pp. 1155–1162.
23.
JiaH. X.XiG.MüllerL.MailachR.VogelerK.Effect of clocking on unsteady blade loading in a four stage low-speed axial compressor, part 1: numerical investigation. ISABE paper 2007–1181, 2007.
24.
MüllerL.MailachR.VogelerK.JiaH. X.XiG.Effect of clocking on unsteady blade loading in a four stage low-speed axial compressor, part 2: experimental investigations. ISABE paper 2007–1182, 2007.
