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 14 of 14 for “"Mass Flow Ratio"”.
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A numerical investigation of s-duct flows with boundary-layer ingestion
… conducted to further NASA's study of active flow control systems for a flush-mounted inlet with significant boundary-layer ingestion (BLI). In conjunction with a NASA-sponsored research grant, the aim is to further accumulate knowledge and insight on the effectiveness of flow control …
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Design and optimization of a humidifier for an HDH system
… is a water treatment technology with low operational requirements that make it ideal for operation in the developing world. Researchers in the lab have just developed a novel design methodology for optimizing the performance of an HDH system based on thermal balancing, similar to the …
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Precipitation of micro/nanoparticles in enhanced high energy dissipation mixing systems
Crystallization is the most common unit operation used in the pharmaceutical industry to synthesize active ingredients. Rapid development of a drug candidate is dependent on the ability to produce a desired drug substance with consistent properties, These properties include stability and purity, …
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Aerodynamic performance measurements of a fully scaled, film-coated, turbine stage
The MIT Blowdown Turbine short duration test facility was used to experimentally measure the aerodynamic performance of a film-cooled turbine stage. Turbine torque, speed, mass flow, temperature, and pressure were measured and used to calculate efficiency. Pressure ratio, corrected speed, and …
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Aerodynamic performance of a transonic turbine blade passage in presence of upstream slot and mateface gap with endwall contouring
… no studies exist in literature for transonic flow conditions. Experiments were performed at the Virginia Tech's linear, transonic blow down cascade facility. Measurements were carried out at design conditions (isentropic exit Mach number of 0.87, design incidence) without and with coolant …
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Aerodynamics of Endwall Contouring with Discrete Holes and an Upstream Purge Slot Under Transonic Conditions with and without Blowing
… aerodynamic performance by reducing secondary flow strength. The effects of endwall contouring with discrete holes and an upstream purge slot for a high turning (127") airfoil passage under transonic conditions are investigated. The total pressure loss and secondary flow field were measured for …
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Numerical Examination of Flow Field Characteristics and Fabri Choking of 2D Supersonic Ejectors
… Fabri choke and Fabri block aerodynamic flow patterns. The effect of primary to secondary stagnation pressure ratio on the efficiency of the ejector operation is measured using the entrainment ratio which is the secondary to primary mass flow ratio. The primary flow of the ejector is …
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Numerical simulation and modelling of the effect of film cooling on entropy noise in a stator blade row
… fundamental understanding of how film cooling flows interact with entropy waves, and their influence on entropy noise generation. A 2D numerical framework has been developed for preliminary understanding of the problem, and then analysis of the effect of film cooling on the entropy noise …
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Trailing Edge Aerodynamics: Flow Regimes, Geometry and Loss
The flow at the trailing edge of a turbine blade at transonic air velocities can be extremely complex. Solid trailing edges can shed vortices in a manner known as transonic vortex shedding, where vortices form very close to the trailing edge and cause large trailing edge shear layer deflection. …
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Heat Transfer Performance Improvement Technologies for Hot Gas Path Components in Gas Turbines
… in order to ensure safe and durable operation, the hot gas path components are additionally supplemented with thermal barrier coatings (TBCs) and sophisticated cooling techniques. The present study focusses on two aspects of gas turbine cooling, namely augmented internal cooling and …
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The effects of micro-vortex generators on normal shock wave/boundary layer interactions
… interactions (SWBLIs) are complex flow phenomena that are important in the design and performance of internal supersonic and transonic flow fields such as engine inlets. This investigation was undertaken to study the effects of passive flow control devices on normal shock …
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Thermodynamic Analysis and Optimization of Supercritical Carbon Dioxide Brayton Cycles
The power generation industry is facing new challenging issues regarding accelerating growth of electricity demand, fuel cost and environmental pollution. These challenges accompanied by concerns of energy resources becoming scarce necessitate searching for sustainable and economically competitive …
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Numerical and experimental investigation of VG flow control for a low-boom inlet
… (VGs) for shock/boundary layer interaction flow control in a novel external compression, axisymmetric, low-boom concept inlet was studied using numerical and experimental methods. The low-boom inlet design features a zero-angle cowl and relaxed isentropic compression centerbody spike, …
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Heat Transfer and Film Cooling Performance on a Transonic Converging Nozzle Guide Vane Endwall With Purge Jet Cooling and Dual Cavity Slashface Leakage
… of implementing a dual cavity slashface configuration and varying slashface coolant leakage mass flow rate on the thermal performance for a 1st stage nozzle guide vane axisymmetric converging endwall. An upstream doublet staggered cylindrical hole jet cooling scheme provides additional purged …