CaltechTHESIS
  A Caltech Library Service

The oscillating vane-type fan

Citation

Colman, Philip (1936) The oscillating vane-type fan. Master's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechETD:etd-07172007-145903

Abstract

The investigation herein described was undertaken to determine the performance characteristics of the oscillating vane-type fan. The fan was the invention of Mr. Van Dorn and Mr. Cornwell, primarily for use in circulating air in railroad refrigerator cars. In the present system of railroad refrigeration for the transportation of perishable foodstuffs, the refrigerator car is a heat insulated car, with bunkers at each end for the cakes of ice. When the car is loaded and the doors shut, cooling is obtained only due to the natural circulation of air in the car, caused by the difference in temperature between the ice in the bunker and the fruit. This circulation has not been found sufficient, in that there is a large temperature difference between the top and bottom fruit (see Appendix B) and the top half is too warm, often spoiling during transportation. Also, because of this, the car cannot be filled to its volumetric capacity. Therefore the requirements which led to the invention of this type of fan were as follows:

1. To provide a sufficient volume of air, against the resistance developed in passing through the fruit, to obtain the cooling characteristics required.

2. To provide a fan which would not require major changes in the structural design of the car, or lessen the amount of fruit which could be carried.

3. To provide a fan, simple in construction and installation, and in its drive mechanism from the car axle.

The oscillating vane-type fan met conditions 2 and 3 in that it could be situated in the four and one half inch space between the floor racks and the floor of the car, through which the air naturally circulated, and in that it could be driven by a simple wheel and crank drive directly off the axle. This thesis presents the results of the investigation of the first condition.

Item Type:Thesis (Master's thesis)
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Aeronautics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Von Kármán, Theodore
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1936
Record Number:CaltechETD:etd-07172007-145903
Persistent URL:http://resolver.caltech.edu/CaltechETD:etd-07172007-145903
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2915
Collection:CaltechTHESIS
Deposited By: Imported from ETD-db
Deposited On:02 Aug 2007
Last Modified:26 Dec 2012 02:55

Thesis Files

[img]
Preview
PDF (Colman_p_1936.pdf) - Final Version
See Usage Policy.

35Mb

Repository Staff Only: item control page