Solar Exhaust Fan with Temperature Sensor

Fan Flow Deflection in Simulated Turbofan Exhaust

Fan flow deflection for jet noise reduction was applied to subscale nozzles simulating the geometry and exhaust conditions of separate-flow turbofan engines. Two types of deflectors were tested, one comprising two pairs of vanes internal to the fan duct and the other consisting of a wedge positioned outside the fan duct. The noise reduction achieved by the vanes was strong in the downward direc...

Pressure Sensor for Exhaust Systems

Exhaust gas regulations for motor vehicles are becoming stricter year-after-year, and as internal combustion engines are being made more efficient and their exhaust gas reduced, there is increased demand for pressure sensing in the exhaust systems of diesel engine vehicles. Applying a single-chip semiconductor pressure sensor fabricated by a CMOS process, which has been successfully used for ma...

High Temperature Solar Concentrators

The use of solar energy in technical applications is often constrained due to its low energy density relative to the conventional sources of energy. Optical concentration is one option to increase the energy density of the solar radiation resulting in the possibility to use absorbers with small surfaces. Higher temperatures can be achieved under concentrated conditions, because heat losses are ...

Low Temperature Solar Collectors

Flow Air And Gas Exhaust Fan Drive Unit Anechoic Test Chamber Flow Management System

The features of the data acquisition and control systems of the NASA Langley Research Cen-ter's Jet Noise Laboratory are presented. The Jet Noise Laboratory is a facility that simulates realistic mixed ow turbofan jet engine nozzle exhaust systems in simulated ight. The system is capable of acquiring data for a complete take-oo assessment of noise and nozzle performance. This paper describes th...