Simple design self-adjusts to provide flow purging in all weather conditions.
NASA’s Marshall Space Flight Center scientists have designed a vent that can be useful for purging closed compartments, while preventing backflow and foreign object entry. The technology uses a system of configurable devices to provide variable flow control and prevent water, insects, or undesired gases from entering a vented space. The technology is effective even in high winds, while conventional rocket vent systems that use mesh screening, flapper valves, and high flow rate purge gas to protect sensitive equipment are not completely effective in extreme weather conditions. Developed for venting and balancing flow in closed rocket compartments, which is critical for NASA, the military, and commercial rocket manufacturers, the design is useful for any device needing a one-way purge valve, flow balancing between compartments, or a general air vent where rain and gas reverse entry must not occur. The system also concentrates generated acoustic energy in a forward cone and can direct noise away from certain areas such as work platforms.