Nuclear Fusion in a Cavitating flow

Hall, Robert (2009). Nuclear Fusion in a Cavitating flow B.Sc Thesis, School of Engineering, The University of Queensland.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
Hall_Robert_Thesis.pdf Hall_Robert_Thesis.pdf application/pdf 1.25MB 0
Author Hall, Robert
Thesis Title Nuclear Fusion in a Cavitating flow
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2009
Thesis type B.Sc Thesis
Supervisor Alex Klimenko
Total pages 48
Language eng
Subjects 0913 Mechanical Engineering
0901 Aerospace Engineering
Formatted abstract
This document investigates two existing phenomena of Nuclear Fusion, and cavitation, to determine if the conditions that exist in a cavitating liquid are extreme enough to cause fusion reactions to occur.

The fusion of two heavy hydrogen isotopes (Deuterium and Tritium) is found to require the lowest temperatures for ignition yet yield the most energy out of a selection of other hydrogen based reactions. The temperature, or kinetic energy, required to cause a break even reaction to occur between these two atoms is calculated to be 30 000 000K.

Independently of this, at first, several methods of theoretical analysis were undertaken based on many assumptions to determine the conditions that exist when a bubble collapses in a cavitating liquid. The key relationships out of these methods of analysis were;

The maximum pressure that exists during bubble collapse

And the maximum temperatures that exists during bubble collapse

At this stage, the temperature required for Deuterium-Tritium ignition was substituted as the maximum temperature in the above equation and solved for two different combinations of T0 and also the pressure ratio of Pm/PGO. The first combination is for a liquid at ambient room temperature (293K). The pressure ratio that would satisfy the maximum temperature requirements is 307 168 and practically unachievable. The second combination is to consider a realistic pressure ratio of 10, and calculate the required ambient liquid temperature to induce a maximum temperature of 30 000 000K. The value for the ambient liquid temperature that meets this requirement is 825 613K. Again, this appears practically unachievable and this was also the case for all combinations of pressure ratio and ambient liquid temperature.

Although these results did not achieve a favourable outcome, the design of a reactor based on a cavitating fluid was investigated to complete an engineering approach to the problem. The basic configuration of a cavitating flow fusion reactor would only differ from other power stations in the fuel cell, and heat exchanging processes. The fuel cell would be a centrifugal pump, pumping a mixture of heavy water and tritium, with most cavities forming near the surface of the pump impellor. Because of this, it is required that the heat exchanging device is as close as possible to this rotating surface. The solutions for this was to include small pipes through the pump shaft, and to pump water/steam through these pipes to remove the heat from the impellor, and use it in a steam turbine to produce electricity.
Keyword Hydrogen isotope

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
Citation counts: Google Scholar Search Google Scholar
Created: Fri, 19 Dec 2014, 12:05:57 EST by Ahmed Taha Siddiqui on behalf of Scholarly Communication and Digitisation Service