System and method for regulating velocity of gases in a turbomachine

A method for regulating a velocity of gases in a turbomachine, the turbomachine comprising a turbine, an exhaust section having an exhaust duct that defines a flow area through which exhaust gases flow, and a heat recovery steam generator (HRSG), the method comprising:

• detecting, with a sensor in operative association with the turbomachine, an operating parameter associated with the velocity of the gases through the turbomachine;
• receiving, with a controller, a measurement signal from the sensor, the signal being associated with the operating parameter;
• and
• adjusting, with the controller, a position of a restriction of a damper positioned within the flow area between the turbine and the HRSG to adjust an amount of the flow area impeded by the restriction based on the measurement signal to regulate the velocity of the gases relative to a predetermined velocity range, wherein the damper is operable to adjust the velocity of the gases based on the position of the restriction, wherein the sensor is positioned within the exhaust duct immediately downstream of the turbine and immediately upstream of the restriction.