Description
Introduction: Types of turbomachines. Dimensional analysis and similarity: application to incompressible and compressible-flow machines. Operating points. Selection of turbomachine type and size: specific speed and specific size. Flow in pipes and system curve. Cavitation: net positive suction head, suction specific speed. Energy transfer between fluid and rotor: steady flow energy equation. Velocity triangles. Stage design parameters: work and flow coefficient. Centrifugal compressors, fans and pumps: description; advantages and disadvantages; analysis and design considerations. Head-capacity relations. Operating point, parallel and series operation of pumps. Slip and energy losses, compressor Surge. Impeller, diffuser and volute construction and design considerations. Axial-flow compressors, fans and pumps: description; advantages and disadvantages; analysis and design considerations. Head Loss mechanisms. Off-design performance: surge and stall. Multistage axial-flow compressors: stage stacking.