Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"compressor design"”.
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High Speed Compressor Design
Abstract: High Speed Compressor Design A long-standing paradox exists in high speed compressor blade design. As the inlet flow to a row of blades approaches the speed of sound, the two-dimensional (2D) design of that blade row becomes exceptionally difficult, with designers laboriously trying to …
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Modular Multi-Stage Axial Compressor Design
… engine's DNA at the end of the development and design phase. One concept to aid in the cost reduction is the modular design of expensive and development-intensive components, such as multi-stage axial compressors. It is the objective of this approach to utilize a "core" module in all the …
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A computational model for multistage axial compressor design
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Forced response predictions in modern centrifugal compressor design
… and time-unsteady flow fields of two centrifugal compressors of nearly identical design (the enhanced, which encountered aeromechanical difficulty, and production, which did not encounter any such difficulty) is undertaken in an effort to establish a causal link between impeller-diffuser …
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Implications of stability modeling for high-speed axial compressor design
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
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Application of an energy-like stability metric for axial compressor design
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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Axial Compressor Design with Counter-Rotation and Variable RPM for Stall Mitigation
<p>Compressor Stall, an aerodynamic instability due to abnormal air flow in the compressor resulting in loss of total pressure and compressor performance. One of the reasons of compressor stall is due to rise in static back pressure at compressor exit which may result from an imbalance of incidence …
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A novel design methodology for enhanced compressor performance based on a dynamic stability metric
(cont.) compressor design optimization framework allows a versatile definition of the objective function such that any combination of pressure ratio, efficiency and dynamic stability can be prescribed at various operating speeds. The compressor design optimization framework uses an effective …
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A Computer Program for the Coupled Implementation of Meanline and Throughflow Methods to Simplify the Aerodynamic Design of Multistage Axial Compressors
… of simplifying the preliminary aerodynamic design process of multistage axial compressors has been developed. This interactive design tool, named C-STAAC, combines the Meanline and Throughflow analysis capabilities of two independent compressor design codes to form one standalone system. The …
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Roll vibration of a reciprocating air compressor
… vibration of a resiliently mounted air compressor about an axis parallel to the axis of the rotor is investigated. An analysis of the motion of the compressor base is conducted using empirical acceleration data. The effect on roll vibration of changing various compressor design …
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An Evaluation and Redesign of a Thermal Compression Evaporator
… liquids from solutions. For maximum efficiency, designers reduce the temperature difference between the heating and heated media using multiple-stage evaporators. This efficiency requires increased size and bulk. A vendor claimed its thermal compression evaporator achieved high efficiency with …
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Development of S3D and Adjoint Design Methods for Efficient Aerodynamic Design of Three-Dimensional High-Speed Compressor Blades
In the second part of the study, an adjoint design method was employed for compressor design to broaden the range of design capability, to facilitate 3D design applications, and to complement the S3D design method. An adjoint design code was developed, based on a 3D compressor flow analysis code, …
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Aerodynamic design of an aspirated counter-rotating compressor
A primary goal in compressor design for jet engines is the reduction of size and weight. This can be achieved by increasing the work output per stage, thereby reducing the required number of stages. In this thesis, the aerodynamic design of a high speed compressor that produces a pressure ratio of …
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Incorporation of High-Fidelity Flow Field Information into Preliminary Design of Multi-Stage Axial Compressors
… the performance estimation of multi-stage axial compressors during preliminary design. Its key differentiator is that radial non-uniformity, inferred from three-dimensional CFD and represented using orthonormal basis functions, replaces empirical correlations of blockage, loss, and deviation as …
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Non-uniform radial meanline method for off-design performance estimation of multistage axial compressors
… cannot meet demand [1], [21. This makes the off-design performance of such gas turbines more important as they spend more of their operational life off the design point. Currently off-design performance cannot be estimated with high fidelity until late in the gas turbine compressor design process …
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Performance and stalling behavior of an axial-flow compressor subjected to three circumferential inlet distortion levels
… and stalling behavior of an axial-flow compressor subjected to several different inlet distortion patterns was investigated. The effect of inlet distortion on overall compressor performance was determined through the measurement of compressor characteristics for each inlet flow …
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CO₂ compression for capture-enabled power systems
… of carbon capture. To this effect, shock compressors have the potential to reduce both operating and capital costs with supporting compression ratios of up to 10:1, requiring less stages and theoretically allowing for the possibility of heat integration with the rest of the plant, allowing …
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The Integration of a Mixed-Flow Impeller with a Crossover Diffuser into the CAT250TJ Engine
… the CAT250TJ MGT engine. Over the past 15 years, compressor design research at Stellenbosch University has focused specifically on MGT engine applications. Previous studies revealed that diffuser design heavily influences overall compressor stage performance, prompting the selection of a new …
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One-Dimensional Performance Modeling of Centrifugal Flow Vaned Diffusers
… tools that enable deeper understanding of compressor stage designs after they have been tested. The insights gained from these investigations have aided in improving new stage designs. Up to now, it has only been possible to use the TEIS and Two Zone models for analysis of test data due to …
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Tip clearance flows in axial compressors: stall inception and stability enhancement
… flow in the rotor tip clearance gap in an axial compressor influences the loss levels and the stall onset point. The role of tip clearance flows in the stall inception process is still debated, though. The aim of this thesis is to improve the fundamental understanding of the tip clearance flow …
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