Spray Nozzle Calibrations
Abstract
Spray nozzle calibration techniques were evaluated. Ten spray nozzles to be utilized for producing simulated icing clouds were calibrated to determine the ranges of mass median droplet diameter and water flow rate. The number and types of spray nozzles calibrated were: (1) two internal mixing, (2) five external mixing, and (3) three sonic mixing nozzles. The calibration results are presented. A comparison was made of the calibration from NASA Lewis Research Center's (NASA-LeRC) Icing Research Tunnel (IRT) and the calibration at AEDC of a NASA-LeRC Standard spray nozzle produced as part of this study. Based upon the comparison, it was concluded that the calibration of a single spray nozzle can be utilized as the calibration of a multinozzle spray bar configuration. From a study of the effects of cell airspeed on the nozzle calibration, it was concluded that no airspeed dependency exists for the calibration. The theoretical liquid water content distribution (LWC) was calculated for a natural icing cloud, and the results were compared with the LWC results obtained as part of this study. It was found that the 10 spray nozzles did not produce comparable distributions at large mass median droplet diamaters. However, an analysis technique utilizing the distribution data obtained for he nozzles was recommended. Keywords: spray nozzles, icing clouds, calibration, liquid water content, mass median, droplet diameter.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADB098392
Entities
People
- Jay D. Hunt
Organizations
- Arnold Engineering Development Complex