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Showing 1 to 20 of 194 for “"turbomachinery"”.
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Creep predictions for turbomachinery components
Several theories of creep and creep rupture are reviewed. Specific attention is devoted to the brittle damage theory proposed by Kachanov. Creep, damage and life predictions for rectangular or circular cross section beams under bending and tensile loads are presented. Comparison with data for a Ni …
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Complex boundary integral techniques for turbomachinery blading
… of the above techniques is to the analysis of turbomachinery blading at an early stage in the design process. Finally, the solution of plane elastostatic problems using complex potentials is considered. A 1st Kind integral equation for the first derivative of one of the Goursat functions is …
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Aerodynamic inverse design of transonic turbomachinery cascades
An aerodynamic inverse design method for turbomachinery cascades is presented and is implemented in a finite volume method. In this design method, the mass-averaged swirl schedule and the blade thickness distribution are prescribed. The design method then provides the blade shape that would …
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One-Dimensional Radial Flow Turbomachinery Performance Modeling
The Two-Element In Series (TEIS) and Two-Zone models have been used successfully for over twenty years to model test data for radial flow compressors and pumps. The models can also be used to predict the performance of new machines provided that the model inputs can be accurately specified. …
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Turbulence Modelling for Complex Flows in Turbomachinery
… reliable tool for modelling complex flows in turbomachinery. To achieve this goal, a three-dimensional (3D) flow phenomenon that embodies many key features of turbomachinery flows, that is, the corner separation flow often found in axial compressor stators, is selected as the research object. …
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Vortical structures in turbomachinery tip clearance flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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MEMS turbomachinery rotordynamics : modeling, design and testing
… speed micro-hydrostatic gas bearings for microturbomachinery in power-MEMS applications. A novel turbine driven microbearing test device for demonstrating repeatable high-speed gas bearing operation was designed, microfabricated and tested. The new microbearing test device incorporates numerous …
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Microfabricated refractory ceramic structures for micro turbomachinery
… thermodynamic requirements of power-generating turbomachinery drive the design towards high rotational speeds and high temperatures. To achieve the specified performance requires materials with high specific strength and creep resistance at elevated temperatures. The thermal and mechanical …
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Improving turbomachinery loss prediction using high fidelity CFD
High fidelity simulations of three compressor cascades and a fundamental trailing edge flow are used to interrogate, and improve upon, the errors present in conventional RANS simulations. Using the optimum turbulence viscosity, calculated from the high fidelity simulations, it is found that error …
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A diffraction integral based turbomachinery noise shielding method
… development of a method for the assessment of turbomachinery noise shielding in hybrid wing body aircraft. The preliminary design and assessment of novel aircraft configurations require both low computational cost and versatility of the shielding method. High fidelity methods, such as for …
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Vibration detection in turbomachinery using non-contacting sensors
… of multiple Eddy Current Sensors (ECS) into turbomachinery. These sensors employ an active magnetic field to monitor each blade as it passes the sensor. They generate an electrical signal proportional to the distance of a blade from the sensor. Existing algorithms extract two pieces of …
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A Design Study of Single-Rotor Turbomachinery Cycles
… were chosen that would describe the new turbomachinery cycle. They either were provided or derived using quasi-one-dimensional compressible flow equations. A MathCAD program developed for the analysis obtained best design points for various cases with the help of an optimizer called Model …
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Using ANSYS Workbench Computer Environment in Turbomachinery Design Process
<p>The main focus of designing turbomachinery is to analyze and optimize the aerodynamic efficiency and structural integrity of the machine. The preferred way to perform aerodynamic and structural analysis is to connect the analyses and shorten the analysis time as much as possible. ANSYS, Inc. …
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Extraction of turbomachinery loss mechanisms from high-fidelity simulations
… a more common-place tool for the analysis of turbomachinery. As a result, new challenges arise in the management and post-processing of the vast amounts of data which are produced by such simulations, especially at representative Reynolds numbers. Currently, many post-processing strategies …
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Materials characterization and structural design of ceramic micro turbomachinery
… the microengine and conventional macroscale turbomachinery, a detailed investigation of the effect of length scale has been conducted. This shows that a direct comparison of a microengine structural design with that embodied in microscale engines is largely irrelevant, especially with regard …
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A linearized Euler analysis of unsteady flows in turbomachinery
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1987.
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Novel turbomachinery concepts for highly integrated airframe/propulsion systems
Two novel turbomachinery concepts are presented as enablers to advanced flight missions requiring integrated airframe/propulsion systems. The first concept is motivated by thermal management challenges in low-to-high Mach number (4+) aircraft. The idea of compressor cooling combines the compressor …
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System modeling and control studies of flutter in turbomachinery
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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