The K9 combustion test facility enables characterization of combustors at sea level with a new steam injection feature to simulate ingestion of rain and hail by the combustor. By providing steam and water directly to the combustor, DGA is now able to check its stability and its loss of efficiency under the most severe test conditions. In this paper, the description of this new water supply will be made and a brief description of quality of the spray used for the production of steam will be presented. A specific study has been made concerning the air flow measurement with some corrections due to the presence of high concentration of steam in the air. The second part of this paper is dedicated to the control of the vaporization of water, the correct control of the steam / air ratio in the flow and the consequences on the thermal behavior of the facility.

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