Abstract: A gas impulse blower for cleaning a surface within a vessel is fillable with a combustion gas-oxi-dizer mixture. The blower comprises: (a) a combustion assembly configured to generate a deflagration wave; and (b) an impulse generator having an inlet and an outlet and adapted to receive the deflagration wave into said inlet and eject the wave from said outlet onto a surface to be cleaned. The impulse generator has a compartmentalized housing comprising at least two serially-connected compartments. The compartments are configured for being fed with said gas-oxidizer mixture by the combustion assembly in an individual manner so as to conduct the wave to the outlet.