Turbofan engine test cells are used to test engines following overhaul and maintenance procedures. Subscale model studies are used to ensure proper design for new construction and to modify existing facilities with marginal operating characteristics.

Pumping performance can be optimized and  infrasound can be minimized by careful design of the exhaust/augmentor system. The presence of a ring diffuser and the configuration of the augmentor termination (basket) in the base of the exhaust stack are two important features.

Pressure, temperature and mass flow measurements are aided with flow visualization to help the engineer understand the overall  performance. Many cells are hindered by poor flow quality (vorticies) approaching the engine inlet.