Effect of water sprays on fire

Heskestad selects the nozzle diameter based on satisfying n, i.e. the effective nozzle diameter (not its actual, due to the complex discharge configurations) is found from 

In this spray scaling, the droplet size was also a consideration, with Heskestad attempting to maintain ni7 constant with D 0 /and l varied at 1 and 10 (or 0.1 and 1 m). Hence, the nozzles used were similar by preserving ni7. As a 

This complies with the general timescale. While this scaling is not perfect, as Re and Ilig are not maintained, the correlation for similar nozzles is very powerful. Moreover, the basis for scale modeling fires with suppression is rational and feasible, and small-scale design testing can be done with good confidence. 

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