Calculations of efficiencies of horlock axial flow turbines pdf-flow steam turbines have been based for many years upon experimentally determined velocity coefficients. A great amount of uncorrelated data is available.
The present paper attempts to bring together the two sets of data and the differing nomenclature and approaches of the steam-turbine designer and the gas-turbine designer. Areas are indicated where further research would be useful. Check if you have access through your login credentials or your institution. 1960 Published by Elsevier Ltd. Screen reader users, click the load entire article button to bypass dynamically loaded article content.
Please note that Internet Explorer version 8. Click the View full text link to bypass dynamically loaded article content. A solemn, strange and mingled air, ’t was sad by fits, by starts was wild. This chapter presents the basic characteristics of axial-flow compressors and ducted fans. Many axial compressors are multi-stage devices and repeating stages are initially assumed in which the velocity triangles for all stages are similar, the mean radius is constant, and the axial velocity through the machine is constant.
The chapter covers the main preliminary design considerations such as stage loading, flow coefficient, reaction, inter-stage swirl, and blade aspect ratio. This includes a new presentation of the ways through which the measurements of cascade loss and turning can be translated into the performance of a compressor stage. Both incompressible and compressible cases are covered in the chapter and the huge importance of off-design performance is presented in detail including the ways a designer can influence compressor operating range during the very early design stages. For preliminary design and analysis purposes, a multi-stage compressor is thought of as a series of single-stage compressors, each performing as it would in isolation.