CONDENSATION OF SUPERSATURATED AMMONIA AND WATER VAPOR IN SUPERSONIC NOZZLES.

An experimental investigation of condensation of ammonia and water vapor in supersonic nozzles is presented. Static-pressure data for both substances were obtained on the same apparatus using dried compressed air as the carrier gas. The effect of carrier-air moisture on the results for ammonia was also studied. A comparison between the data and predictions using existing nucleation and drop-growth theories indicated that neither the classical nor revised, so-called gasification, theories were generally applicable. The former agreed with the water data while the latter was in agreement with the data for ammonia. Author