Helical (Beltrami) flow with nonuniform coefficient is considered for
the case of compressible fluid and a class of exact solutions is propo
sed. A paradox of helical flow is discussed and the compressibility is
considered as a possible resolution of the paradox. Examples with dif
ferent symmetries are given for the compressible helical flow and, in
particular, the generalization of the ABC (Arnold-Beltrami-Childress)
flow for the compressible case is proposed. (C) 1995 John Wiley and So
ns, Inc.