Hany Moustapha's foundational 2003 textbook, Axial and Radial Turbines
Moustapha's work is renowned for its focus on the "total design" of the turbine, moving beyond just aerodynamics to include:
The working fluid flows parallel to the shaft. These are standard in large-scale power generation and gas turbine engines, handling high mass flow rates effectively.
A rotating assembly that changes the momentum of the high-velocity fluid. As the fluid exerts a force on the rotor blades, it generates torque, spinning the main shaft. Fluid Flow Directions
Turbines are mechanical devices that extract energy from a fluid flow (such as air, steam, or combustion gases) and convert it into useful work, typically by rotating a shaft. The primary distinction between axial and radial turbines lies in the direction of the fluid flow relative to the axis of rotation. Axial Turbines axial and radial turbines by hany moustaphapdf 2021
2D axisymmetric methods (Streamline curvature or matrix through-flow) to compute radial equilibrium and spanwise variations.
The choice between axial and radial depends on specific speed (
Axial Flow: Inlet ───► [ Rotor Shaft ] ───► Outlet (Parallel) Radial Flow: Inlet ───► ┌─────────────┐ │ Rotor Shaft │ ───► Outlet (Perpendicular Inlet) └─────────────┘
The authors of the 2021 PDF edition are Hany Moustapha, Mark F. Zelesky, Nicholas C. Baines, and David Japikse. Each is a distinguished expert in turbomachinery, bringing unparalleled practical experience from industry leaders like Pratt & Whitney Canada and Concepts NREC. As the fluid exerts a force on the
Understanding the velocity vectors (absolute, relative, and blade velocities) at the inlet and outlet of each blade row is essential.
Flow Direction: Inward, perpendicular to the axis.
If you are building a turbocharger for a car or a small waste-heat recovery unit, the offers the perfect blend of high-pressure ratio extraction, compact size, and manufacturing economy.
While the title by Hany Moustapha and co-authors is a seminal work in turbomachinery originally published in 2003 , its principles remain the gold standard for modern engineers. In 2021, research in the field—including studies from MDPI Energies —continues to build upon Moustapha's foundational methods to compare axial and radial configurations for new applications like small-scale power generation and underwater vehicles. published by Concepts NREC
The study of axial and radial turbines remains a dynamic field where classical physics meets cutting-edge material science. The work of Hany Moustapha continues to provide the framework for understanding how these machines can be made smaller, hotter, and more efficient. Whether you are analyzing a massive power plant turbine or a palm-sized turbocharger, the principles of fluid dynamics and thermodynamics remain the ultimate guides.
Applications: They are the standard for jet engines (turbofans and turbojets) and large-scale steam and gas turbines in power plants. Radial Turbines
Axial and Radial Turbines by Hany Moustapha, published by Concepts NREC, serves as a foundational text for modern turbomachinery, covering fundamental thermodynamics, aerodynamics, and structural design for both turbine types. The work emphasizes the integration of computational tools with practical engineering applications, including blade cooling and performance analysis. For more details, visit Concepts NREC . Axial and Radial Turbines - Amazon.com