EFFUSION PHENOMENA AS APPLIED TO A LIFTING DEVICE
Abstract
There are no microporous media presently available which will permit an effusion process to take place at atmospheric pressure. Although the production of microporous media with the desired hole diameter is presently obtainable, the production of material with the required thickness is beyond the present state-of-the-art. Even if the thickness requirements could be met, the circuitous nature of the pore channels makes it impossible to achieve effusive flow. The thickness of the microporous media required to test for lift by the effusion process at atmospheric pressure approaches atomic dimensions. Material of this thickness is impractical for the application considered here. The tube model calculation set an upper limit on lift, a limit which is much smaller than the lift predicted. It is believed that the low calculated values of lift combined with the stringent materials requirements for effusion fail to justify a more detailed analysis of the feasibility of producing lift by means of the effusion process
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1961
- Accession Number
- AD0262123
Entities
People
- A. R. Phillips
- C. M. Askey
- U. M. Robinson