Blowing model for turbulent boundary-layer dust ingestion

Conventional turbulent boundary layer theory is used to obtain the rate at which dust is ingested in the case of a semiinfinite flat plate, as well as that of the boundary layer behind a moving shock wave, under the assumption that the local dust injection rate corresponds to the blowing rate at which the local, unblown surface shear is reduced to a value sufficient for the maintenance of surface particles in a mobile state. The predictions for local erosion rate, boundary thickness, and dust density are compared with the limited experimental results of Hartenbaum (1971) and Ausherman (1973) for the semiinfinite flat plate and moving shock cases, respectively. Agreement within a factor of 2 is obtained.