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    Tu-22M3: News

    Isos
    Isos

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    Post  Isos on Sun Dec 29, 2019 10:07 pm

    About AB engine color.

    https://theaviationist.com/2019/12/26/tu-22m3-backfire-engines-transition-from-idle-to-full-reheat-captured-in-stunning-detail/

    [...]Second, the video shows with unprecedented detail the afterburner ignition sequence and the subsequent generation of the typical blue plume of many Russian engines (from 07:00 mark). In fact, as opposed to the orange plume you can observe on Western afterburners, Russian ones appear to be blue in color meaning that all the injected fuel is burnt before exiting the nozzle (the result of the engine design and the way fuel is dumped into the center of the cylinder): there is a more complete combustion and the reaction creates enough energy to excite and ionize gas molecules in the flame, leading to a blue flame appearance. In other words the blue flame is produced by molecular radicals, especially CH and C2, which emit most of their light in the blue region of the visible spectrum. The orange color is instead caused by fuel not completely burned out before exiting the nozzle, thus creating soot (unburnt carbon particles) that glows in the heat of the flame giving the orange color.[...]
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    mnztr

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    Post  mnztr on Mon Dec 30, 2019 12:01 am

    Isos wrote:About AB engine color.

    https://theaviationist.com/2019/12/26/tu-22m3-backfire-engines-transition-from-idle-to-full-reheat-captured-in-stunning-detail/

    [...]Second, the video shows with unprecedented detail the afterburner ignition sequence and the subsequent generation of the typical blue plume of many Russian engines (from 07:00 mark). In fact, as opposed to the orange plume you can observe on Western afterburners, Russian ones appear to be blue in color meaning that all the injected fuel is burnt before exiting the nozzle (the result of the engine design and the way fuel is dumped into the center of the cylinder): there is a more complete combustion and the reaction creates enough energy to excite and ionize gas molecules in the flame, leading to a blue flame appearance. In other words the blue flame is produced by molecular radicals, especially CH and C2, which emit most of their light in the blue region of the visible spectrum. The orange color is instead caused by fuel not completely burned out before exiting the nozzle, thus creating soot (unburnt carbon particles) that glows in the heat of the flame giving the orange color.[...]

    I have read that the Russians use an additive to the fuel to increase the amout of nitrogen in the exhaust, I think this is to protect the hot section of the turbine perhaps allowing then to run higher temps? ..
    GarryB
    GarryB

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    Post  GarryB on Mon Dec 30, 2019 8:17 am

    Hello. But is it possible that the white exhaust in the AB mode is because of water injection into engines? Thanks.

    Interesting idea, but I don't think so... water injection tends to generate thick black smoke... like the B-52 on take off...

    The only Soviet/Russian aircraft that uses material injected into the engines is on the MiG-25 that uses alcohol injected into the intakes for cooling purposes and to increase thrust at high altitude...

    In very low light or night videos you can see the entire cone of the AB on both the Backfire and Blackjack... they are certainly a sight for sore eyes...
    George1
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    Post  George1 on Mon Jan 20, 2020 5:12 pm


    - At the end of last August, Russian Minister of Industry and Trade Denis Manturov very optimistically told Interfax that the first M3M is undergoing factory flight tests, the second will join it by the end of the year, and in the third quarter of 2020 they will be submitted for state joint tests. According to him, a contract is being prepared for the modernization of the Tu-22M3 to Tu-22M3M standard.

    = In November 2019, information (however, not confirmed by anyone) thundered in the media that the military began sending stored Tu-22M3s to Kazan. A special relish to the news on the “triples” is given by the fact that they must carry hypersonic “Daggers” and “Zircons”.

    https://bmpd.livejournal.com/3909470.html

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