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An Experimental Investigation of the Pressure Loss in Flow Through Helical Coils


Weatherup, Robert Alexander (1949) An Experimental Investigation of the Pressure Loss in Flow Through Helical Coils. Engineer's thesis, California Institute of Technology. doi:10.7907/KZ8G-V819.


NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. This thesis is a report of an experimental investigation of pressure losses in flow through helical coils of circular cross section. The investigation aimed at the determination of a multiplying factor [...] which could be applied to the friction factor for an equivalent straight pipe in order to determine the effective friction factor for flow through a helical coil. The following conclusions were reached: 1. The multiplicative factor [...] is a function of Reynolds number and has a minimum value at a Reynolds number of approximately 8,000. 2. The factor [...] is also dependent on the ratio [...]. The general effect of this ratio is to increase [...] as the ratio [...] is decreased. At Reynolds numbers above 8,000, however, [...] was found to be rather insensitive to variation in [...] over the range from [...] with a minimum at [...]. 3. The factor [...] was found to be independent of the ratios [...] and [...] over the ranges investigated.

Item Type:Thesis (Engineer's thesis)
Subject Keywords:Aeronautics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Seifert, Howard S.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1949
Record Number:CaltechETD:etd-02052009-133758
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:512
Deposited By: Imported from ETD-db
Deposited On:09 Feb 2009
Last Modified:29 Mar 2023 17:30

Thesis Files

PDF (Weatherup_ra_1949.pdf) - Final Version
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