Patent ID: 9562476
Date: 2017-02-07
CPC Classifications: F01D,F02C,F16K,G05D

Claim:
1. An apparatus comprising: a gas turbine engine flow device including an inner member and a surrounding member; the inner member having a first coefficient of thermal expansion; and the surrounding member at least partially surrounding the inner member and having a second coefficient of thermal expansion that is different from the first coefficient of thermal expansion of the inner member; the surrounding member including at least two walls that include a planar first wall and a cylindrical second wall that form a variable flow gap between an end of the second wall and an outer periphery of the first wall, wherein the inner member is oriented relative to the at least two walls of the surrounding member such that, based on the difference in the first and second coefficients of thermal expansion, the inner member expands relatively greater than the surrounding member or the surrounding member expands relatively greater than the inner member, according to a temperature change to correspondingly enlarge or reduce the size of the variable flow gap between the at least two walls.