NOVELTY - The turbine (10) has a set of radially engraved channels (26) placed axially near a turbine shaft (5). A set of channels includes two curvatures (30, 31), where one of the curvatures with small radius is concaved pertinent to a rotational direction of a disk rotor (1), and is started from an entering port to middle of a flow path. The other curvature with large radius is convexed pertinent to the rotational direction of the rotor, and is positioned near a peripheral of the rotor. A set of buckets is attached at every flow channel to direct against a nozzle (3) placed on a housing unit (2).    USE - Centrifugal reverse flow disk turbine for use in power mover e.g. engine such as gasoline engine, diesel engine, scroll engine, gas engine, vane-type engine and stirling engine, and fuel cell, of an air turbine, a water turbine, a pump, a compressor, a blower, a windmill (all claimed), a steam turbine and a gas turbine to generate power in a fossil power plant and a nuclear power plant. Can also be used for solar applications, automobiles, aircraft, ship and railroad applications, space application, sea water desalination, fuel production e.g. hydrogen, ethanol, methanol and biogases, industrial/public welfare applications, steam production, separation/recovery, underground storage, sequestration in deep sea of carbon dioxide, ocean thermal energy conversion and food production and breeding.    ADVANTAGE - The rotor is rotated at predetermined velocity by receiving working fluid at an end portion of the channel, so that the working fluid is passed through the channel in the direction, and the rotor is rotated at another predetermined velocity greater than the former predetermined velocity by receiving the working fluid from another end portion of the channel, so that the working fluid is passed through the channel in another direction opposite to the former direction so as to produce a counter supersonic flow force. The working fluid entering from an axial mouth is conveyed due to centrifugal force to the bucket at the peripheral of the rotor, and is ejected in the opposite direction to the rotation of the rotor so the outward flow provides a counter supersonic flow with a jet from the nozzle fixed to the housing, thus increasing rotational power and introducing high pressure and temperature gas to the nozzles placed to the housing unit, and hence ejecting supersonic flows against the rotor to yield rotational power. The turbine generates rotationally-positive torque due to viscous effect when the working fluid is passed through one of the curvatures of the flow channel, and the force due to momentum change is yielded when the working fluid is passed through the other curvature so as to contribute positive rotational power.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a prime mover comprises a centrifugal reverse flow disk turbine    (2) a method for earning rotational power using a centrifugal reverse flow disk turbine.    DESCRIPTION OF DRAWING(S) - The drawing shows a partial sectional view of a centrifugal reverse flow disk turbine.    Disk rotor (1)    Housing unit (2)    Axially aligned nozzle (3)    Turbine shaft (5)    Centrifugal reverse flow disk turbine (10)    Radially engraved channel (26)    Curvatures (30, 31)