An Experimental Study of High Weber Number Impact of Methoxy-Nonafluorobutane C4F9OCH3 (HFE-7100) and n-Heptane Droplets on a Heated Solid Surface

Published

March 1, 2002

Author(s)

Samuel L. Manzello, Jiann C. Yang

Abstract

An experimental study is presented for methoxy-nonafluorobutane (C₄F₉OCH₃, HFE-7100) droplet impingement on a heated stainless steel surface. The impaction process was recorded using a high-speed digital camera at 1000 frames per second. The initial droplet diameter was fixed at 1.7 0.1 mm, and all experiments were performed in atmospheric air. The impact velocity was fixed at 2.0 m/s thus defining an impact Weber number of 750. The temperature of the stainless steel surface was varied from 20 to 300 C, above the Leidenfrost temperature of HFE-7100. Experiments were also performed using n-heptane to investigate whether the collision dynamics were similar if the impact Weber number was matched to HFE-7100 and collision considered within the same boiling regimes as HFE-7100. While the collision dynamics were qualitatively similar, the evolution of liquid film diameter with time was different. Existing models used to describe the evolution of liquid film diameter with time were found to be inadequate to describe HFE-7100 and n-heptane impact.

Citation

International Journal of Heat and Mass Transfer

Volume

45

Issue

No. 19

Pub Type

Journals

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Keywords

droplet, fire suppression, impact

Citation

Manzello, S. and Yang, J. (2002), An Experimental Study of High Weber Number Impact of Methoxy-Nonafluorobutane C₄F₉OCH₃ (HFE-7100) and n-Heptane Droplets on a Heated Solid Surface, International Journal of Heat and Mass Transfer, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=861082 (Accessed April 25, 2024)