Reliable Cryogenic Flow Controller

Arnold Engineering Development Complex (AEDC) has a wide range of test facilities used to validate aerospace technology, including chambers that simulate space environments. These simulations require accurate thermal control of large chambers at cryogenic temperature. AEDC is interested in using a new type of actuator to modulate a valve for flow control of cryogenic (~20 K) gaseous helium inside space simulation chambers. The actuator was developed by Dynamic Structures and Materials (DSM) with support from NASA; it has progressed through multiple successful prototypes and is ready for validation and insertion into relevant applications. The goal of the proposed research is to perform further development and validation of the actuator and combine it with a suitable valve so that it can be used to improve the performance of the space simulation chambers. When installed, the technology will offer many benefits, including faster chamber cycle times, reduced thermal load, better temperature control, reduced chance of faults related to vacuum deposition, and reduced operator oversight. A test program will be used to validate the system before it is used in the chambers. As part of the program, actuated valves will be delivered to AEDC for installation and use at the facility.