Below is a recent abstract detailing the latest results on aerodynamics and design features of the supersonic hydrogen vehicle. Following are the first four published papers in a series of papers, whose collective objective is to analyze the scientific foundations and feasibility of the supersonic tube vehicle. Topics covered by the planned series, with main title "Hydrogen Tube Vehicle for Supersonic Transport," include (a) the concept and preliminary feasibility, (b) comparison of speed and energy with other transport modes, (c) aerodynamics in hydrogen, (d) levitation, (e) hazard analysis, including flammability and intratube noise, and (f) total cost--the sum of infrastructure, operating, maintenance.
"Vehicle Projects' Miller Proposes Futuristic Supersonic Fuel Cell-Powered Tube Train"
DENVER, CO - "Taking the tube" may at some future time take on a radically different meaning than the conventional one of riding London's subway.
It would still mean riding in a train inside a tube tunnel. But if Dr. Arnold Miller's concept is realized, it would mean whisking from, say, New York to Los Angeles in less than three hours in a bullet-shaped articulated vehicle train powered by fuel cells that spin huge counter-rotating sets of propellers front and aft.
Peter Hoffman, "Vehicle Projects' Miller Proposes Futuristic Supersonic Fuel Cell-Powered Tube Train." Hydrogen & Fuel Cell Letter, 23:11 (Nov 2008).Download the PDF >
"Engineering Work Starts on Supersonic H2 Tube Train with Praxair Funding"
GOLDEN, CO - First proposed half a decade ago, work is now beginning on the prototype model of a supersonic vehicle that travels inside a tunnel with a hydrogen atmosphere.
Arnold Miller, Ph.D., president of the non-profit Supersonic Institute here, announced funding is now in place to start Phase 1 of a five-phase project to study and demonstrate a small prototype of such a vehicle that can transport cargo or people inside a large tube filled with a hydrogen atmosphere.
Peter Hoffman, "Engineering Work Starts on Supersonic H2 Tube Train with Praxair Funding." Hydrogen & Fuel Cell Letter, 23:11 (Jul 2013).Download the PDF >
"Supersonic Transport with Zero Carbon Emissions"
Presented at the Low Carbon Earth Summit in China (October 2011), this presentation discusses the latest results on aerodynamics of the vehicle in a hydrogen atmosphere within a tube and present design features stemming from the analysis. Design features include the tube geometry and propeller characteristics. An overview of a formal hazard analysis will also be presented.
A. R. Miller, "Supersonic Transport with Zero Carbon Emissions." To be published in the conference proceedings of the Low Carbon Earth Summit 2011, Dalian, China, 19-26 October 2011.Download the abstract >
"Aerodynamics in a Hydrogen Atmosphere: Supersonic Tube Vehicle"
Presented at the AIAA Joint Propulsion Conference in July 2010, this paper discusses aerodynamics in a hydrogen atmosphere. While fundamental aerodynamic concepts apply to hydrogen as readily as to air, aerodynamics in a tube is the principal challenge. In this paper, the focus is on the tube-vehicle phenomenon of accelerated gas flow, termed gap flow, through the gap formed by the vehicle outer surface and the tube inner surface. Equations are derived for the drag due to gap flow and the power required to overcome it. The equations for gap flow, gap drag, and gap power have allowed several design advances in the supersonic tube vehicle concept.
A.R. Miller, "Aerodynamics in a Hydrogen Atmosphere: Supersonic Tube Vehicle." Published in the proceedings of the 46th AIAA/ASME/SAE/ASEE Joint Propulsion and International Energy Conversion Engineering Conference, Nashville, TN, USA, 25-28 July 2010.Download the PDF >