US 12,241,407 B2
Method of controlling deflagration combustion process in pistonless combustor
Timo Eramaa, Vantaa (FI); and Heikki Salminen, Vantaa (FI)
Assigned to Finno Exergy Oy, Vantaa (FI)
Appl. No. 17/617,373
Filed by Finno Energy Oy, Vantaa (FI)
PCT Filed Jun. 8, 2020, PCT No. PCT/FI2020/050398
§ 371(c)(1), (2) Date Dec. 8, 2021,
PCT Pub. No. WO2020/249862, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 20195487 (FI), filed on Jun. 9, 2019; and application No. 20195488 (FI), filed on Jun. 9, 2019.
Prior Publication US 2022/0252005 A1, Aug. 11, 2022
Int. Cl. F23R 7/00 (2006.01); F02C 5/12 (2006.01); F23R 3/58 (2006.01)
CPC F02C 5/12 (2013.01) [F23R 3/58 (2013.01); F23R 7/00 (2013.01); F05D 2240/35 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of controlling a deflagration combustion process in a pistonless combustor having an outer wall and a center therewithin, the combustion process consisting of repeating working cycles divided to equally long time units from 0 to 1000 so that one working cycle of the deflagration combustion process is 1000 time units, and the method comprising the steps of:
opening a first input valve, the first input valve introducing scavenging air into the pistonless combustor thereby scavenging combustion products of a previous cycle;
opening a second input valve after opening the first input valve, the second input valve introducing first-flow air into the pistonless combustor thereby initiating a flow pattern having a first circumferential flow component rotating within the pistonless combustor about the center, the second input valve being opened at earliest 450 time units before a reference point and closed at the reference point;
opening a second-flow air input valve after opening the second input valve, the second-flow air input valve introducing second-flow air into the pistonless combustor in a nonparallel angle in relation to the first-flow air input through the second input valve thereby creating a second circumferential flow component to the flow pattern rotating within the pistonless combustor for increasing speed of combustion propagation, the second-flow air input valve being opened at earliest 170 time units before the reference point and closed at latest 100 time units after the reference point;
introducing a fuel into the pistonless combustor after the opening of the first input valve, creating a fuel-air mixture flowing within the flow pattern; and
igniting the fuel-air mixture within the pistonless combustor thereby increasing pressure within the pistonless combustor, where the ignition is performed at earliest 70 time units before the reference point and at latest 60 time units after the reference point,
wherein the reference point is a closing event of the second input valve, and
the outer wall of the pistonless combustor has an off-center output channel connected thereto that is constantly open.