39.Give the condition for the flow to be one dimensional and lossless. For one dimensional flow, the derivative of moment of momentum about the axis of flow is equal to the total moments of all the forces about this axis. For lossless flow, the total moment on the fluid by the first impeller equals the total moments on the shaft of the second impeller. 40.How is equilibrium condition maintained in turboflowmeter? The driven is restrained by a spring or any elastic element. The moment acting on the driven wheel is balanced by the elastic moment of the spring and thus the wheel is brought to equilibrium condition if the flow rate is steady. 41. What are the Advantages of lobed impeller flow meter? It is increasingly accurate at higher flows where leakage or slip is decreased. It can be used for corrosive service. It has good capacity range. 42. What are the limitations of lobed impeller flow meter? i. It cost is relatively high. ii. It requires frequent maintenance of rotating parts.
39.Give the condition for the flow to be one dimensional and lossless. For one dimensional flow, the derivative of moment of momentum about the axis of flow is equal to the total moments of all the forces about this axis. For lossless flow, the total moment on the fluid by the first impeller equals the total moments on the shaft of the second impeller. 40.How is equilibrium condition maintained in turboflowmeter? The driven is restrained by a spring or any elastic element. The moment acting on the driven wheel is balanced by the elastic moment of the spring and thus the wheel is brought to equilibrium condition if the flow rate is steady. 41. What are the Advantages of lobed impeller flow meter? It is increasingly accurate at higher flows where leakage or slip is decreased. It can be used for corrosive service. It has good capacity range. 42. What are the limitations of lobed impeller flow meter? i. It cost is relatively high. ii. It requires frequent maintenance of rotating parts.
industrial-2-marks.docx