Preliminary Development of a Measurement Reference Using a Research Simplex Atomizer

Abstract

Cold-flow spray researchers have an array of diagnostic tools to extract meaningful information on spray characteristics. The efficacy of many of these tools, however, depends heavily on calibration, alignment, human operation, and even the underlying operational theory. This can lead to large discrepancies in data values for seemingly identical setups between workers. The application of experimental data to numerical models is thereby hindered due to inconsistencies in results caused by experimental error. Previously, an attempt was made to produce a “reference spray” through the use of a research simplex atomizer (RSA). As manufacturing processes and diagnostic tools have improved, the RSA is being revisited. Here, a new RSA has been investigated. Fundamental datasets captured from detailed test conditions are presented to provide benchmark data with the intention of other workers testing the reproducibility of the results. Preliminary findings between laboratories show good agreement in droplet size measurements. Further, emphasis is placed on the sensitivity of laser diagnostics used and the effect their operation can incur. To satisfy the requirements of a measurement reference, it is paramount that all workers adhere to similar diagnostic configurations and detail their operating parameters.