The Quasiturbine (Qurbine) is a « Positive Displacement » turbine alternative.
Suitable as a double-circuits Rotary Motor or Expander
for compressed air, steam and other fluids,
or (later) as an advanced Internal Combustion Rotary Engine,
as well as (later) for Compressor of various thermodynamic cycles.
The Quasiturbine is a compact, low weight and high torque machine
with top efficiency, specially in power modulation applications.
The Quasiturbine is a pistonless Rotary Machine
using a deformable rotor whose blades (sides) are hinged at the vertices.
The volume enclosed between the blades of the rotor
and the stator casing provides compression and expansion
in a fashion similar to the familiar Wankel engine,
but the hinging at the edges allows higher compression ratio
and different time dependencies, while suppressing the Wankel rotor dead time,
and this without the complex rotor synchronization gears.
Unlike vane pumps, which vane extension is important and against which
the pressure acts to generate the rotation, the Quasiturbine contour seals have an
imperceptible extension and the rotation does not result from pressure against these seals.
Since the cylindrical (or oval) stator of vane devices has a radius of curvature
greater than the rotor, the two surfaces (rotor - stator) cannot reach a close
fit at top dead center (TDC), while the surfaces of both the rotor and stator of
the Quasiturbine fit exactly against one another to produce a high compression
ratio. This is why QT is efficient (less pressure charging losses), and this is why there is no vane combustion engine.
Quasiturbine publishes « efficiency data ».