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.
Results
Showing 1 to 20 of 596 for “"inflow"”.
-
Rotor Inflow Noise Caused by a Boundary Layer: Inflow Measurements and Noise Predictions
A rotor immersed in a thick turbulent boundary layer produces unsteady loading on the blades which generates unwanted noise and vibration. Two point velocity fluctuations were measured in detail to determine the full four-dimensional correlation function of a boundary layer generated over a smooth …
-
Coastal sources of estuarine inflow
… The next project examined the sources of inflow to an estuary in an idealized three-dimensional primitive equation model with simple forcing. The model grid features an estuarine channel next to a sloping, unstratified shelf with mixing provided by a single frequency, 12-hour tide. Inflow …
-
Littoral wetlands and lake inflow dynamics
… can raise the water temperature of the lake inflow during summer enough to create surface inflows when a plunging inflow would otherwise exist. Consequently, more land borne nutrients and chemicals enter the epilimnion where they can enhance eutrophication and the risk of human exposure. The …
-
Potential-flow Inflow Model Including Wake Distortion and Contraction
<p>Dynamic wake models have been used in real-time flight simulations for over thirty years. The models have evolved from the earliest, three-degree-of-freedom models (derived from momentum theory) to full finite-state models derived from potential flow theory by a formal Galerkin method. These …
-
Experimental Measurements of Vortex Breakdown with non-Isothermal Inflow
… and shows the effect of heat addition at the inflow of a vortex generator on the onset and behaviour of breakdown modes. Smoke flow visualization experiments were preformed to identify heating and swirl rate effects on vortex flow, and the resulting swirl angle of the flow was measured. …
-
A new appreciation of inflow modelling for autorotative rotors
A dynamic inflow model is a powerful tool for predicting the induced velocity distribution over a rotor disc. On account of its closed form and simplicity, the model is highly practical especially for studying flight mechanics and designing control systems for helicopters. However, scant attention …
-
A Rigorous Solution for Finite-State Inflow throughout the Flowfield
… is extended to all three velocity components of inflow across the rotor disk in a mathematically rigorous way so that it can be used to calculate the inflow below the rotor disk plane. This establishes a complete dynamic inflow model for the entire flow field with finite state method. The …
-
Measurements of in-cylinder heat transfer with inflow-produced turbulence
… the problem of in-cylinder heat transfer with inflow-produced turbulence. Initial tests were conducted without the generated turbulence; this enabled the researchers to compare the results of this apparatus to previous work. Then, an orifice plate was added to the apparatus to generate …
-
A macroeconometric analysis of South Africa’s post-liberalisation capital inflow components
… South Africa received substantial capital inflows following socio-political and financial liberalisation in the mid-1990s. However, unlike many other emerging countries, the bulk of South Africa’s post-liberalisation inflows have been in the traditionally short-term forms of portfolio and …
-
Trace metal sources for the Atlantic inflow to the Mediterranean Sea
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1989.
-
A design study of radial inflow turbines in three-dimensional flow
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
-
Foundations for the Coupled Inflow and Structural Dynamics of Multi-rotor Helicopters
… model is expanded to calculate the coupled inflow and rotor dynamics of tandem rotor configurations. This establishes the foundation for a more complete multi-rotor, dynamic inflow model with finite-state methods. The derivation presented in this work is for the general case of two rotors in …
-
INFLOW: Spatially Integrating Local Water Capture into Gugulethu and Surrounds, Cape Town
… of a multi-purpose public open space. The term 'Inflow', is applied to define and encapsulate the approach: the movement of both water and people into space in the pursuit of place-making opportunities. To test the hypothesis, the design research applies the 'accessibility surface' of movement …
-
Measurement and modeling of in-cylinder heat transfer with inflow-produced turbulence
… Stirling machines. For cylinder spaces without inflow, heat transfer and related power losses can be predicted using an analytical model which neglects turbulence. In actual engine cylinders, where significant turbulence levels can be generated by high velocity inflow, a model which neglects …
-
The Relationship Between Capital Inflow Surges and Stock Price Booms in Emerging Countries
… emerging economies attractive to foreign capital inflows. Along with the benefits have been costs. At times, excessive capital inflows have led to domestic credit booms and asset price bubbles. There is little doubt that on average, capital inflow surges are likely to increase stock prices. But if …
-
Evaluation and Assessment of Inflow Rates in Tunnels Excavated in Jointed Rock Mass
… effects of key parameters affecting groundwater inflows were investigated using 2-D Distinct Element Method Program which can take into account the coupled hydro-mechanical behavior within the rock fractures. The main concluding points of the study can be summarized as follows: (1) The …
-
Understanding sewer infiltration and inflow using impulse response functions derived from physics-based models
Infiltration and inflow (I&I) are extraneous flow in a sanitary sewer system that originate from surface water and ground water. I&I can overload the sewer system and wastewater treatment plants, and cause sanitary sewer overflows (SSOs) or basement flooding. This flow can account for as much as …
-
A design study of radial inflow turbines with splitter blades in three-dimensional flow
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
Page 1 of 30