MODULAR TURBOMACHINE INLET ASSEMBLY AND RELATED INLET TRANSITION SECTION

摘要

An inlet transition section and an inlet bowl entry can be designed to reduce a number of turbomachine casing designs. Using relationships between flow properties, distances between elements, crossover/supply pipe diameter, ideal cross sectional area, aspect ratio, and inlet bowl entry size, a transition from circular cross section to substantially polygonal cross section can be made while enabling adoption of a single size of substantially polygonal inlet bowl entry for a plurality of turbine sizes and/or crossover/supply pipe sizes with minimal losses.

主权项

1. A turbomachine inlet transition section comprising:
a substantially circular entry; a reshaping portion beginning at the substantially circular entry and ending at an intermediate region having a first substantially polygonal cross section, a cross section of the reshaping portion changing from substantially circular at the entry to the first substantially polygonal cross section at the intermediate region while maintaining substantially constant cross sectional area throughout the reshaping portion; and a prismoidal portion beginning at the intermediate region and ending at an inlet transition section exit having a second substantially polygonal cross section, a cross section of the prismoidal portion changing from the first substantially polygonal cross section to the second substantially polygonal cross section, the first and second substantially polygonal cross sections being of the same type of polygon while being of substantially different dimension.