US 11,656,588 B2
Design, control and operation of filters for turbomachines
Patrick Weber, Weinheim (DE); Georg Hirsch, Ubstadt-Weiher (DE); and Thomas Schroth, Bobenheim-Roxheim (DE)
Assigned to CARL FREUDENBERG KG, Weinheim (DE)
Filed by Carl Freudenberg KG, Weinheim (DE)
Filed on Jul. 15, 2019, as Appl. No. 16/511,010.
Claims priority of application No. 18191594 (EP), filed on Aug. 30, 2018.
Prior Publication US 2020/0073348 A1, Mar. 5, 2020
Int. Cl. G05B 19/042 (2006.01); G06F 30/20 (2020.01); B01D 46/00 (2022.01); B01D 46/44 (2006.01); F02C 7/05 (2006.01)
CPC G05B 19/042 (2013.01) [B01D 46/0032 (2013.01); B01D 46/442 (2013.01); F02C 7/05 (2013.01); G06F 30/20 (2020.01); G05B 2219/2614 (2013.01)] 9 Claims
OG exemplary drawing
1. A method for designing a filter assembly for an air supply to a turbomachine, comprising:
calculating a current and/or an expected concentration of particles in air present at an inlet of at least one filter stage of the filter assembly as a function of a mean size of the particles;
calculating a sensitivity spectrum that, depending on the mean size of the particles, indicates an extent to which a predetermined concentration of such particles has a negative effect on performance and/or on service life of the turbomachine by erosion and/or chemical corrosion;
calculating, for at least one filter candidate usable in the filter stage and/or switchable on or off, a concentration of particles to be expected at an outlet of the filter from a concentration and filter properties of the at least one filter candidate;
calculating a quality rating from the concentration and a sensitivity spectrum;
assigning the at least one filter candidate and/or the filter assembly; and
forming the filter assembly from one or more filter candidates in such a manner that a flow resistance of the filter assembly is optimized under a predetermined boundary condition for the quality rating.