Vaporization response of evaporating drops with finite thermal conductivity

A numerical computing procedure was developed for calculating vaporization histories of evaporating drops in a combustor in which travelling transverse oscillations occurred. The liquid drop was assumed to have a finite thermal conductivity. The system of equations was solved by using a finite difference method programmed for solution on a high speed digital computer. Oscillations in the ratio of vaporization of an array of repetitivity injected drops in the combustor were obtained from summation of individual drop histories. A nonlinear in-phase frequency response factor for the entire vaporization process to oscillations in pressure was evaluated. A nonlinear out-of-phase response factor, in-phase and out-of-phase harmonic response factors, and a Princeton type 'n' and 'tau' were determined. The resulting data was correlated and is presented in graphical format. Qualitative agreement with the open literature is obtained in the behavior of the in-phase response factor. Quantitatively the results of the present finite conductivity spray analysis do not correlate with the results of a single drop model

Droplet vaporization with liquid heat conduction Final report

Mathematical model for droplet vaporization with liquid heat conductio

Aerothermochemical analysis of non-oscillatory and oscillatory characteristics of liquid bipropellant rocket motors - Wave model, droplet heating, and evaporation program computation Third quarterly report no. 65-1

Aerothermochemical analysis of nonoscillatory and oscillatory characteristics of liquid bipropellant rocket motors - wave model, droplet heating, and evaporation computer progra

Aerothermochemical analysis of non-oscillatory and oscillatory characteristics of liquid bipropellant rocket motors - droplet evaporation, wave equations, motor instrumentation, non-oscillatory program computation

Model to determine vaporization rate of liquid fuel drople

Steady state aerothermochemistry for liquid bipropellant rocket motors

Model and theoretical equations describing liquid propellant droplet ballistics and combustion gas behavior in bipropellant rocket motors - aerothermochemistr

Development of electroforming techniques for the fabrication of rocket engine injectors Final report, phase 2

Electroforming techniques for fabrication of rocket engine injector using hypergolic fue

Energy Resource Transportation Governance: Case Studies of The Alberta Oil Sands and The Argentinian Vaca Muerta Shale Oil Fields

In recent years, there has been increasing focus on the economic and other benefits of the development of “unconventional” sources of oil—resources that cannot be produced using traditional production techniques—partly due to the increased scarcity of conventional oil reserves. This paper compares and contrasts unconventional oil resources in Canada and Argentina. Canada has deposits of bitumen known as oil sands/tar sands. Bitumen is “a thick, sticky form of crude oil that is so heavy and viscous that it will not flow unless it is heated or diluted with lighter hydrocarbons” (Government of Alberta 2009), and when mixed with sand and clay, is known as the oil sands. In Argentina there are shale oil formations, which is crude oil found in low-permeability rock formations. The unconventional hydrocarbons in Canada (the oil sands) and Argentina (shale oil) are significant resources for both countries, especially when compared with their conventional reserves. Though the institutional structure is different in both countries—Canada’s oil and gas and transportation companies are privately-owned, whereas in Argentina, they are partially government owned—the rhetoric of the discussions seems to be similar in both countries: many are in favor of development due to the significance of the economic benefits. However, in both countries, the development of transport infrastructure has been hindered by different factors, on environmental grounds, notably with regard to concerns regarding greenhouse gas emissions (in Canada) and lacking sufficient planning capabilities and institutional framework for long-term investments such as railroads (in Argentina)

JIST: just-in-time scheduling translation for parallel processors

The application fields of bytecode virtual machines and VLIW processors overlap in the area of embedded and mobile systems, where the two technologies offer different benefits, namely high code portability, low power consumption and reduced hardware cost. Dynamic compilation makes it possible to bridge the gap between the two technologies, but special attention must be paid to software instruction scheduling, a must for the VLIW architectures. We have implemented JIST, a Virtual Machine and JIT compiler for Java Bytecode targeted to a VLIW processor. We show the impact of various optimizations on the performance of code compiled with JIST through the experimental study on a set of benchmark programs. We report significant speedups, and increments in the number of instructions issued per cycle up to 50% with respect to the non-scheduling version of the JITcompiler. Further optimizations are discussed