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Research Progress in Shape-Control Methods for Wire-Arc-Directed Energy Deposition. [PDF]
Materials (Basel)Wang J, Zhao B, Liu Y, Zhao J, Ma G.
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Performance analysis of a transonic high-pressure turbine
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2007Efficiency is a crucial design parameter in any turbine development. This research presents a detailed investigation on the efficiency of a modern transonic high-pressure turbine. The work focuses on the study of the efficiency loss at different stage loading factors (ranging from Δ H/U 2 = 1.
Guillermo Paniagua, Tolga Yasa
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Experimental and numerical flow visualization in a transonic turbine
Journal of Visualization, 2008This paper focuses on the visualization of both experimental and numerical results and presents research in a highly-loaded cold-flow transonic turbine under continuous and engine-representative conditions. Special focus was placed on blade row interaction at app. 10600 rpm.
Jakob Woisetschläger +6 more
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An Examination of the Contributions to Loss on a Transonic Turbine Blade in Cascade
Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; General, 1990Experiments to measure losses of a linear cascade of transonic turbine blades are reported. Detailed measurements of the boundary layer at the rear of the suction surface of a blade and examination of wake traverse data enable the individual components of boundary layer, shock and mixing loss to be determined.
MEE, DJ +3 more
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Interaction Effects in a Transonic Turbine Stage
Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, 2000A 3D, viscous, time-accurate code has been used to predict the time-dependent flowfield in a transonic turbine stage. Two analytical techniques are used to understand the unsteady physics. One technique takes into account interaction effects associated with reflected waves bouncing between blade rows while the other neglects them. Both techniques model
J. W. Barter, P. H. Vitt, J. P. Chen
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Design of a Transonic Research Turbine Facility
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006*† ‡ The design of a continuous operation transonic research turbine facility is described. The purpose of this turbine rig is to provide an environment for the development of performance enhancing flow control technologies at conditions that are similar to those in real engines.
Ruolong Ma, Scott Morris, Thomas Corke
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Transonic Turbine Vane Wake Flows
Volume 1: Turbomachinery, 1996This paper summarizes the research on transonic turbine vane wake flows carried out in a Transonic Planar Cascade at the National Research Council of Canada between 1987 and 1995. The cascade used in the research is a large scale, continuously operating, inflow facility which was developed to study both flow phenomena and aerodynamics of turbine vanes.
W. E. Carscallen +2 more
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Loss Generation in Transonic Turbine Blading
Journal of Turbomachinery, 2017The measured loss characteristic in a high-speed cascade tunnel of two turbine blades of different designs showed distinctly different trends with exit Mach number ranging from 0.8 to 1.4. Assessments using steady Reynolds-averaged Navier--Stokes equations (RANS) computation of the flow in the two turbine blades, complemented with control volume ...
Penghao Duan +3 more
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Stator/rotor interaction in a transonic turbine
24th Joint Propulsion Conference, 1988This paper presents calculations of a stator/rotor interaction in a highly loaded transonic first turbine stage. Of particular interest is the propagation and reflection of shocks which originate at the trailing edge of the upstream stator. These produce a 40% variation in the lift on the rotor, which would cause structural vibrations and increased ...
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Off-Design Performance of a Single-Stage Transonic Turbine
Journal of Turbomachinery, 1998This paper presents results of rig testing of a transonic, single-stage turbine at off-design conditions. Mapping of the 3.4 pressure ratio, 1.9 stage loading turbine ranged from 70 through 120 percent of design speed and 75 to 125 percent of design pressure ratio.
M. Woinowsky-Krieger +3 more
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