Development of a Hemispherical Metal Diaphragm for Single-Cycle Liquid-Metal Positive Expulsion Systems
Abstract
This report presents experimental results pertaining to the design and development of a metallic expulsion diaphragm for single-cycle positive expulsion of high-temperature liquid in an agravity condition. The diaphragms were made from type 304 stainless steel having a wall thickness of 10 or 16 mils. Tests were conducted in a 22-inch-diameter transparent lucite sphere in order to observe the diaphragm during the expulsion cycle. For, simplicity, water was used as the working fluid, both pressurant and expellant(Greater than 98 percent expulsion without failure was obtained only with a diaphragm configuration less than a complete hemisphere. A diaphragm with a 1/2-inch equatorial segment removed from a 22-inch-diameter hemisphere success- fully expelled over 98 percent of the enclosed liquid. Diaphragms slightly larger than complete hemispheres could only obtain between 60 and 82 percent expulsion before failure. It appears that metallic diaphragms without a method of controlling random deformation cannot go through more than one complete expulsion cycle without failure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1965
- Accession Number
- ADA392839
Entities
People
- Sol Gorland
Organizations
- National Aeronautics and Space Administration