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Showing 1 to 20 of 276 for “"transonic"”.
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Transonic thermal blooming
… unity. However, the nonlinearities in the transonic equations cutoff the trend to infinity, and the values of the flow perturbation quantities are finite. The nonlinear equations with heat addition are transformed into simple linear algebraic equations through the specification of the …
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Flow in Multistage Transonic Compressors
Transonic compressors are regularly used as part of the compression system in industrial gas turbines because their high operating speeds make them capable of producing high stage pressure ratios and they have a high efficiency. The flow inside a these compressors is inherently unsteady due to …
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Transonic aerodynamics of dense gases
Transonic flow of dense gases for two-dimensional, steady state, flow over a NACA 0012 airfoil was predicted analytically. The computer code used to model the dense gas behavior was a modified version of Jameson's FLOS2 airfoil code. The modifications to the code enabled modeling the dense gas …
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Flowfield measurements in a transonic turbine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1995.
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Studies of Multipoint Optimization of Transonic Stators
A Multidisciplinary Design Optimization code was developed for NASA Stator 37. 3 different RANS solvers, Spalart-Allmaras, K-ε, and K-ω, were compared to design data to determine which was the fastest without significant error. K-ω was shown to be the most accurate, while only being 13.3% slower …
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Aerodynamic inverse design of transonic turbomachinery cascades
… used to obtain a shock-free design of an impulse transonic cascade and of the ONERA transonic compressor cascade. A parametric study has shown that the blade profile is rather sensitive to the prescribed loading distributions and that, in most cases, a smooth loading distribution results in a …
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Development of a transonic turbine cascade facility
… describes the design and initial testing of a transonic turbine cascade facility. It is specifically concerned with the best way to obtain flow periodicity and repeatability through the cascade by the use of tailboards at the cascade exit. The problem of how to achieve flow periodicity and …
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An Extended Calibration and Validation of a Slotted-Wall Transonic Wall-Interference Correction Method for the National Transonic Facility
… varying levels of ventilation at the National Transonic Facility (NTF) were modeled and calibrated with a general slotted wall (GSW) linear boundary condition to validate the computational model used to determine wall interference corrections. Free-air lift, drag, and pitching moment …
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Cascade wind tunnel for transonic compressor blading studies.
The design and construction of a small, transonic, cascade wind tunnel are reported. The tunnel is of the intermittent blow-down type, and the initial test cascade models the flow at the rotor blade tips of a single stage transonic compressor at a relative Mach number of 1.U-. General programs were …
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Designing Shock Control Bumps for Transonic Commercial Aircraft
… considered promising flow control devices for transonic commercial aircraft. By generating a λ-shock structure, 2D SCBs offer large drag savings, but perform poorly when that structure breaks down off-design. Milder-performing 3D devices produce weak vortices, that may offer some boundary layer …
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Newton solution of steady two-dimensional transonic flow
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1985.
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Newton solution of steady two-dimensional transonic flow
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1985.
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Grid adaptation for complex two-dimensional transonic flows
Bibliography: v.1, p. 529-539.
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Unsteady radial transport in a transonic compressor stage
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Transonic aeroelastic analysis of systems with structural nonlinearities
… characteristics. Aerodynamic flows at transonic Mach numbers generate nonlinear aerodynamic forces on the wing affecting the aeroelastic response of the wing. Analysis techniques accounting for these structural and aerodynamic nonlinearities, and an understanding of their potential …
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Efficient and robust design optimization of transonic airfoils
… have been employed for the design of airfoils in transonic flow based on the transonic small-disturbance (TSD) and Euler equations. A sequential approximation optimization technique was implemented for solving the design problem of lift maximization with wave drag and area constraints. A simple …
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Flow randomness and tip losses in transonic rotors
The flowfields of two axial-flow fans and one core compressor are studied in this thesis. The research data, previously gathered by other researchers, was obtained by means of a high-response dual hot wire aspirating probe. The probe measures total pressure and total temperature (and thereby …
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