Method for predicting air cycle machine turbine ice formation and shedding and journal bearing wear
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-017/00
G06F-017/40
출원번호
US-0406565
(2006-04-18)
등록번호
US-7502717
(2009-03-10)
발명자
/ 주소
Elpern,David G.
Menon,Sunil K.
Morando,Alex
Parthasarathy,Girija
Schryver,Jon E.
출원인 / 주소
Honeywell International Inc.
대리인 / 주소
Ingrassia Fisher & Lorenz, P.C.
인용정보
피인용 횟수 :
4인용 특허 :
14
초록▼
Methods and apparatus are provided for predicting ice formation on and shedding from blades of an air cycle machine ("ACM") turbine. The method comprises generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, determining an amount
Methods and apparatus are provided for predicting ice formation on and shedding from blades of an air cycle machine ("ACM") turbine. The method comprises generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, determining an amount of ice formation on the blades of the ACM turbine, and determining an amount of ice shed from the blades of the ACM turbine. The apparatus comprises means for generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, means for determining an amount of ice formation on the blades of the ACM turbine, and means for determining an amount of ice shed from the blades of the ACM turbine. In some embodiments, the means and apparatus may also involve predicting ACM wear, based at least in part on the predicted ice formation and shedding.
대표청구항▼
What is claimed is: 1. A method for predicting ice formation on and shedding from blades of an air cycle machine ("ACM") turbine for an aircraft, the method comprising the steps of: (a) generating operational condition data representative of ACM turbine operating conditions using a software model o
What is claimed is: 1. A method for predicting ice formation on and shedding from blades of an air cycle machine ("ACM") turbine for an aircraft, the method comprising the steps of: (a) generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, the software model of the ACM configured to simulate operating conditions of the ACM turbine using operating conditions of the aircraft; (b) determining an amount of ice formation on the blades of the ACM turbine, using the generated operational condition data; and (c) determining an amount of ice shed from the blades of the ACM turbine, using the determined amount of ice formation and the generated operational condition data. 2. The method of claim 1, wherein the generated operational condition data comprises temperature, pressure, and entrained moisture of air for the ACM turbine. 3. The method of claim 1, wherein the amount of ice shed is determined using values for maximum holding stress of ice for the turbine blades. 4. The method of claim 1, further comprising: supplying aircraft operating data representative of aircraft environmental conditions to the software model of the ACM, to thereby generate the operational condition data. 5. The method of claim 4, wherein the aircraft operating data comprises air temperature, humidity, and altitude. 6. The method of claim 4, further comprising the steps of: generating a performance model configured for use in determining boundary conditions for the ACM; and determining boundary conditions for the software model of the ACM, using (i) the generated performance model and (ii) the generated operational condition data. 7. The method of claim 1, further comprising: determining the amount of ice formation and the amount of ice shed from an icing model, the icing model incorporating typical water droplet size distribution values, heat transfer parameters, and maximum holding stress values of ice for the ACM turbine blades. 8. The method of claim 7, wherein the determination of the amount of ice formation is using an assumption of uniform ice formation over the ACM turbine blades. 9. The method of claim 1, further comprising: determining an amount of water deposited on the ACM turbine blades, using (i) the generated operational condition data and (ii) water droplet size distribution values. 10. The method of claim 9, wherein the amount of ice formation is determined using (i) the amount of water deposited on the ACM turbine blades and (ii) heat transfer parameters. 11. A method for predicting wear to an aircraft air cycle machine ("ACM") for an aircraft from ice shedding on ACM turbine blades, the method comprising the steps of: (a) generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, the software model of the ACM configured to simulate operating conditions of the ACM turbine using operating conditions of the aircraft; (b) determining an amount of ice formation on the blades of the ACM turbine, using the generated operational condition data; (c) determining an amount of ice shed from the blades of the ACM turbine, using the determined amount of ice formation and the generated operational condition data; and (d) determining an amount of wear of the ACM, using the amount of ice formed on and shed from the blades of the ACM turbine. 12. The method of claim 11, wherein the ACM includes one or more journal bearings, and wherein the determined amount of wear is representative of wear for the ACM journal bearings. 13. The method of claim 11, further comprising: generating historical operational condition data representing different sets of generated operational condition data for a particular ACM turbine over a period of time; and determining a cumulative amount of wear for the ACM, based on the generated historical operational condition data. 14. The method of claim 11, wherein the generated operational condition data comprises temperature, pressure, and entrained moisture of air for the ACM turbine. 15. The method of claim 11, further comprising: supplying aircraft operating data representative of aircraft environmental conditions to the software model of the ACM, to thereby generate the operational condition data. 16. The method of claim 11, further comprising: determining the amount of ice formation and the amount of ice shed from an icing model, the icing model incorporating typical water droplet size distribution values, heat transfer parameters, and maximum holding stress values of ice for the ACM turbine blades. 17. The method of claim 16, wherein the determination of the amount of ice formation is using an assumption of uniform ice formation over the ACM turbine blades. 18. A system for predicting ice formation and shedding on turbine blades of an aircraft air cycle machine ("ACM") for an aircraft, the system comprising: (a) means for generating operational condition data representative of ACM turbine operating conditions using a software model of the ACM, the software model of the ACM configured to simulate operating conditions of the ACM turbine using operating conditions of the aircraft; (b) means for determining an amount of ice formation on the blades of the ACM turbine, using the generated operational condition data; and (c) means for determining an amount of ice shed from the blades of the ACM turbine, using the determined amount of ice formation and the generated operational condition data. 19. The system of claim 18, further comprising: means for supplying aircraft operating data representative of aircraft environmental conditions to the software model of the ACM, to thereby generate the operational condition data. 20. The system of claim 18, further comprising: means for determining an amount of wear for the ACM, using the amount of ice shed from the blades of the ACM turbine.
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이 특허에 인용된 특허 (14)
Dziorny Paul J. (132 Strawberry La. Manchester CT 06040) McAuliffe Christopher (18 Kellogg St. Windsor CT 06095), Air cycle machine with interstage venting.
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