Model Injection System Induced Accelerations in the Rent Test Leg of the 50 Megawatt Facility
Abstract
The Re-Entry Nose Tip (RENT) test leg of the 50 Megawatt Facility is used for hyperthermal testing of nose tips under simultaneous conditions as high as 100 atmospheres impact pressure and 18,000 BTU/ft2 sec heat flux to a 0.25 inch radius nose tip. Such extreme conditions normally require very rapid carriage movement to avoid either total destruction of a model which has been designed to sweep through the test gas flow or significant shape change of an ablation model before it has been pinned at the desired testing position. Accompanying these rapid carriage movements are large accelerations and decelerations which must be considered in the structural design of test articles. Past practice has been to structurally overdesign the models so that they would survive even the most severe g-loadings which the model injection system might impose on them. During October, 1972 a new type of testing was initiated in the RENT test leg-thermostructural testing. The nature of thermostructural testing requires the models and particularly their instrumentation to be rather fragile. The work documented in this report was performed to support this new type of testing. A complete matrix of acceleration/deceleration data over the anticipated operating range of the model support system is reported. This data can then be used for model and instrumentation design for future thermostructural tests in the RNNT test leg of the 50 Megawatt Facility.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1973
- Accession Number
- ADA377098
Entities
People
- Lawrence A. Walchli
Organizations
- Flight Dynamics Laboratory