Abstract: Radial distribution of the static pressure at stator surface was measured in a rotor-stator disk cavity with centric inflow and two outflows. Cooling air enters at the center of the system and leaves through the holes in the rotor and clearance between rotor and shroud. The influences of disk rotational speed, mass flow rate of inlet and presence of the blade-cooling holes on the flow characteristics in the cavity were investigated. Results show that, within the ranges of the experiments, the static pressure on the stator firstly decreases and then increases along the radial direction. Static pressure is also increasing with the cooling air flow rate, but decreasing as the disk rotational speed and the numbers of blade-cooling holes increase. When the cooling air flow rate is greater, there is no an obvious core fluid rotation formed in the cavity.