2001
DOI: 10.1115/1.1425810
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Numerical Investigation of Airfoil Clocking in a Three-Stage Low-Pressure Turbine

Abstract: A quasi-three-dimensional, blade-to-blade, time-accurate, viscous solver was used for a three-stage LP turbine study. Due to the low Reynolds number, transitional computations were performed. Unsteady analyses were then carried out by varying the circumferential relative position of consecutive vanes and blade rows to study the effects of clocking on the turbine's performance. A clocking strategy developed in order to limit the number of configurations to be analyzed is discussed. The optimum analytically-dete… Show more

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Cited by 40 publications
(9 citation statements)
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“…In the future, under the more mature condition, one will improve the calculation accuracy of the excitation frequencies to satisfythe engineering actual requirements more. Especially, one will adopt the unsteady flow simulation method for optimization, this is because the unsteady rotor–stator interaction [ 22 , 23 ] has a great influence on the performances of the turbine stage.…”
Section: Application Of Mdo To Transonic Turbine Stagementioning
confidence: 99%
“…In the future, under the more mature condition, one will improve the calculation accuracy of the excitation frequencies to satisfythe engineering actual requirements more. Especially, one will adopt the unsteady flow simulation method for optimization, this is because the unsteady rotor–stator interaction [ 22 , 23 ] has a great influence on the performances of the turbine stage.…”
Section: Application Of Mdo To Transonic Turbine Stagementioning
confidence: 99%
“…Significant experimental and numerical research has been performed over the last several years on highlighting and understanding the unsteady aerodynamics of multi-stage turbomachinery (e.g., Reinmoller et al, 2001;Arnone et al, 2001;Gombert and Hohn, 2001;Dorney et al, 2001;Clark et al, 2000;Busby et al, 1998;Rao et al, 1994;Chen et al, 1994;Sharma et al, 1992;Takahashi and Ni, 1991;Giles, 1990;Jorgenson and Chima, 1990;Rai, 1987;Dring et al, 1992). Much of this work has focused on quantifying the unsteady flow field resulting from the interaction between rotors and stators in terms of aerodynamic performance and airfoil surface unsteady pressure.…”
Section: Introductionmentioning
confidence: 99%
“…A lot of investigations have proved that the highest efficiencies occurred when the first-stage stator wake impinged on the second-stage stators while the lowest were observed when the first-stage stators wake convected through the mid-passage region between the second-stage stator airfoils (Arnone et al [5], Dorney et al [6,7]). Cizmas and Dorney [8] extended this conclusion to rotor clocking and 2D multistage clocking.…”
Section: Introductionmentioning
confidence: 99%