【Mechanical Equipment Technology Exchange Edition】Mechanical Equipment 【Daily Question】20190921
Thread Content
Question: What is the working principle of a single-stage reaction turbine? There are no answers provided for this series of posts; fellow netizens are free to share their own opinions – just reply with what you understand. Replies earn rewards ranging from 5 to 15 points; all forum members are welcome to participate actively and support the development of the forum! ! ! Chemical Equipment and Machinery
Working principle of reaction turbines: In a reaction turbine, steam not only expands and accelerates within the nozzles, but it continues to expand and accelerate as it flows through the passages of the rotor blades. That is, within the rotor blade array, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
Steam induces an accelerated flow within the blade channels, resulting in a steam velocity at the blade outlet that is higher than the inlet velocity; this causes a reaction force on the blade, which in turn drives the impeller to rotate
In a reaction stage composed of a set of static vanes and dynamic vanes, there is a pressure drop and an increase in velocity in the static vanes; the pressure further decreases and expansion accelerates in the dynamic vanes. As a result, the steam flow exerts a reactive force on the dynamic vanes, thereby driving the shaft to rotate and perform work.
In reaction turbines, steam not only expands and accelerates in the nozzles, but it continues to expand and accelerate as it flows through the rotor blade passages; that is, within the rotor blade cascade, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
In reaction turbines, steam not only expands and accelerates in the nozzles, but it continues to expand and accelerate as it flows through the rotor blade passages; that is, within the rotor blade cascade, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
Working principle of reaction turbines: In a reaction turbine, steam not only expands and accelerates within the nozzles, but it continues to expand and accelerate as it flows through the passages of the rotor blades. That is, within the rotor blade array, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
Steam induces an accelerated flow within the blade channels, resulting in a steam velocity at the blade outlet that is higher than the inlet velocity; this causes a reaction force on the blade, which in turn drives the impeller to rotate
In reaction turbines, steam not only expands and accelerates in the nozzles, but it continues to expand and accelerate as it flows through the rotor blade passages; that is, within the rotor blade cascade, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
Working principle of reaction turbines: In a reaction turbine, steam not only expands and accelerates within the nozzles, but it continues to expand and accelerate as it flows through the passages of the rotor blades. That is, within the rotor blade array, not only does the direction of the steam flow change, but its relative velocity also increases. Therefore, the moving blades are subjected not only to the thrust from the high-speed steam flow at the nozzle exit but also to the reaction force as the steam leaves the blade row; that is, a reaction turbine utilizes both the impulse principle and the reaction principle to generate power.
In reaction turbines, steam not only expands in the nozzles, resulting in a decrease in pressure and an increase in velocity; the high-speed airflow exerts a thrust on the blades. Moreover, as the steam flows past the blades, it expands further, causing the steam to flow out of the blades at higher speed, and this also generates a reactive force on the blades – namely the reaction force – which drives the blades to rotate and perform work. This is the principle of reaction in reaction steam turbines