Hydrogen tube vehicle for supersonic transport: Analysis of the concept

Hydrogen tube vehicle for supersonic transport: 4. Hydrogen propeller

“…The Bombardier Dash 8 Q400 [9] uses the Dowty R408 propeller [17], a six-bladed, carbon-fiber composite propeller with scimitar-shaped blades. We assume that the hub diameter, blade shape, and propeller diameter of the hydrogen propeller are the same as the air propeller and that it uses two contrarotating rows of blades.…”

“…The conceptual supersonic hydrogen vehicle operates within an enclosed, hydrogen-filled tube at cruise speed of 1 km/ s. To prevent leakage of air into the tube, hydrogen pressure is minimally above outside air pressure, and the tube serves as a phase separator rather than a pressure vessel. Within the tube, a vehicle levitates above a guideway on a magnetic field or gas film and uses propeller propulsion; it breathes fuel for fuelcell power from the tube, stores liquid oxygen onboard, and collects the product water as it operates [9].…”

A Novel High Temperature Superconducting Maglev Vehicle with a Propulsion Engine

“…There are many liquid nitrogen cryostats at the bottom of the car body to cool the bulk HTSC. Considering overcoming the drawback of a unilateral type linear motor and satisfying the need and performance of the aero-vehicle frame, the propulsion engine is more suitable to be used as running power of the aerovehicle based on the discussion about conventional passenger transport modes by Miller [9], The engine is installed at the rear and on top of the body due to shape-limitations of the guideway and the stabilizing effect in the longitudinal direction.…”

Hydrogen tube vehicle for supersonic transport: 3. Atmospheric merit

“…A new idea is to use hydrogen as the tube atmosphere [9,10]. The conceptual supersonic hydrogen vehicle operates within an enclosed, hydrogen-filled tube at cruise speed of 1 km s À1 .…”

“…The conceptual supersonic hydrogen vehicle operates within an enclosed, hydrogen-filled tube at cruise speed of 1 km s À1 . Within the tube, a vehicle levitates above a guideway on a magnetic field or gas film and uses propeller propulsion; it breathes fuel for fuelcell power from the tube, stores liquid oxygen onboard, and collects the product water as it operates [9]. The tube serves as a phase separator rather than a pressure vessel, and the Mach number and drag can be very different in the two phases.…”