Experimental Study of Compressed Air Foam System and Its Foam Rheology

The paper described a newly developed high performance compressed air foam system(CAFS). The effective system generates uniform foam with greater momentum by injecting compressed air into flowing foam solution. Foam generated by this system presented superior viscous and wetting properties to water. A pendulum system was designed to measure yield stress of foam. The results proved the existence of yield stress of foam. And the increasing tendency of yield stress with gas fraction and bubble size has also been found out.