According to the present invention, a measurement method of oxygen dissolved in fuel during an aircraft′s rising from the ground surface comprises: a step (a) of injecting a certain volume of fuel into a fuel tank for test and forming an ullage, which accommodates air, on an upper space of the fuel tank for test; a step (b) of supplying air into the fuel tank for test and making the oxygen concentration of the air in the ullage an oxygen concentration at the atmospheric pressure; a step (c) of supplying nitrogen gas into the fuel tank for test and reducing the oxygen concentration in the ullage down to the nonflammable concentration or below, which is lower than the oxygen concentration at the atmospheric pressure; a step (d) of reducing the pressure in the fuel tank for test from the atmospheric pressure in the fuel tank for test down to the pressure corresponding to the aircraft rising up to a certain altitude; and a step (e) of measuring the oxygen-partial pressure in the ullage of the fuel tank for test and the oxygen-partial pressure dissolved in the fuel in accordance with the pressure changed from the atmospheric pressure to a certain altitude in the previous step. The measurement method of oxygen dissolved in fuel during an aircraft′s rising from the ground surface is able to measure the discharge volume of oxygen dissolved in the fuel by configuring a measuring system which is the same as the rising process of an actual aircraft from the ground surface.

    본 발명에 따른 항공기 상승 중 연료 내 용존산소 지상 측정 방법은 (a) 테스트용 연료 탱크에 일정량의 연료를 주입하여 테스트용 연료 탱크의 상부 공간에 공기가 수용되는 얼리지(ullage)를 형성하는 단계, (b) 테스트용 연료 탱크 내부에 공기를 공급하여 얼리지 내 공기에 대한 산소 농도를 대기압 상태의 산소 농도로 구성하는 단계, (c) 테스트용 연료 탱크 내부에 질소 가스를 공급하여 얼리지 내 산소 농도를 대기압 상태의 산소 농도 보다 상대적으로 낮은 불연화 농도 이하로 저감하는 단계, (d) 테스트용 연료 탱크 내부의 대기압으로부터 일정 고도까지 상승되는 항공기에 대응되는 압력으로 테스트용 연료 탱크 내부를 감압하는 단계 및 (e) (d) 단계에서 대기압으로부터 일정 고도까지 변화되는 압력에 따른 테스트용 연료 탱크의 얼리지 내의 산소 분압과 연료 내의 용존산소 분압을 측정하는 단계를 포함하는 것을 특징으로 한다.


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    Titel :

    MEASUREMENT METHOD OF OXYGEN DISSOLVED IN FUEL DURING AIRCRAFT CLIMB AT THE GROUND CONDITIONS


    Weitere Titelangaben:

    항공기 상승 중 연료 내 용존산소 지상 측정 방법


    Beteiligte:
    BAE KANG SIK (Autor:in) / LEE DONG HYEONG (Autor:in)

    Erscheinungsdatum :

    2020-07-31


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT




    Dissolved Oxygen Measurement Method on ground Simulating the Temperature Change in Aircraft Fuel Tank during climb

    BAE KANG SIK / KIM MIN HEE / KEITH ALLEN SAUNDERS | Europäisches Patentamt | 2020

    Freier Zugriff


    Aircraft rate-of-climb indicators

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    Fastest climb of a turbojet aircraft

    OJHA, SHA K. | AIAA | 1993