Throngh the brief introduction of advanced performance of static blade adjustable axial compressor,the author expounds the optimization control theory of blast furnace blowers,and summarizes the control methods of safe and efficient operation.

The design methods of axial blast furnace blower supervision system,functions of control modules as well as the realization of undisturbed switching of adjustable vane control system are discussed.

A method for preventing the surge of axial blower with adjustable vane and its realization with programable logic controller are described.

Some discuss on technology trend and aerodynamics problem of adjustable blade;

According to the blade external flow theory, speed distribution of blade surfaceshown by transformation coefficient has been obtained by means of conformal transforma-tion and series developmtent,thus giving mathematic model of hydrodynamic moment ofadjustable blades of axial pumps, and reliability study.