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 9 of 9 for “"meanline"”.
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Probabilistic analysis of meanline compressor rotor performance
… The performance of the rotor is computed using a meanline model that includes the effect of tip clearance blockage, calculated by assuming the tip leakage behaves like a wake in a pressure gradient and incorporating the effects of double leakage. The model is used to quantify performance …
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Non-uniform radial meanline method for off-design performance estimation of multistage axial compressors
… made. This thesis presents a Non-Uniform Radial Meanline method for multistage axial compressor off-design performance estimation, capturing the transfer of radial flow non-uniformity and its impact on compressor blade row performance. This method enables the high-fidelity characterization of …
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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
… design tool, named C-STAAC, combines the Meanline and Throughflow analysis capabilities of two independent compressor design codes to form one standalone system. The program greatly improves the efficiency of the Preliminary-to-Throughflow stages of compressor design by providing fully …
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Multi-parameter control for centrifugal compressor performance optimization
… consists of first developing a one-dimensional meanline model for estimating performance of centrifugal compressor system followed by the formulation of a control framework incorporating the meanline model. Performance estimate of a representative centrifugal compressor system with adjustable …
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Novel turbomachinery concepts for highly integrated airframe/propulsion systems
… is assessed with computational experiments and meanline modeling. A cooled multistage compressor with adiabatic design point is found to achieve higher pressure ratio, choking mass flow, and efficiency (referenced to an adiabatic, reversible process) at fixed corrected speed, with greatest …
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A Hybrid Vortex Solution for Radial Equilibrium in Axial Compressors
… CFX simulations are generated after 1D design, meanline design, throughflow design and blade design.</p> <p>One of the key factors to evaluate compressor operation is off-design performance, which can be represented by the compressor map. Compressor maps are also generated and compared for each …
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Experimental investigation of an aspirated fan stage
… the possible benefits of aspiration, a meanline parameter study is performed over a range of rotor inlet Mach numbers, flow coefficients, and work coefficients. Viscous and shock losses are estimated for both conventional and aspirated stages. The results suggest that aspiration can have …
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A methodology for capturing the impacts of bleed flow extraction on compressor performance and operability in engine conceptual design
… quantified using a low fidelity, multi-stream, meanline analysis. Here, an innovative approach was developed which cross pollinated existing methods used elsewhere in the analysis environment, to account for the bleed impact in the object oriented modeling environment. Implementation of this …
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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. …