Slashdot Mirror


Mysterious Sound Waves Can Destroy Rockets

Ponca City, We love you writes "Scientists believe that powerful and unstable sound waves, created by energy supplied by the combustion process, were the cause of rocket failures in several US and Russian rockets. They have also observed these mysterious oscillations in other propulsion and power-generating systems such as missiles and gas turbines. Now, researchers at the Georgia Institute of Technology have developed a liquid rocket engine simulator and imaging techniques to help demystify the cause of these explosive sound waves and bring scientists a little closer to being able to understand and prevent them. The team was able to clearly demonstrate that the phenomenon manifests itself in the form of spinning acoustic waves that gain destructive power as they rotate around the rocket's combustion chamber at a rate of 5,000 revolutions per second. Researchers developed a low-pressure combustor to simulate larger rocket engines then used a very-high-speed camera with fiber optic probes to observe the formation and behavior of excited spinning sound waves within the engine. 'This is a very troublesome phenomenon in rockets,' said Professor Ben Zinn. 'These spinning acoustic oscillations destroy engines without anyone fully understanding how these waves are formed. Visualizing this phenomenon brings us a step closer to understanding it.'"

22 of 193 comments (clear)

  1. Brown noise by rubies · · Score: 5, Funny

    It makes rocket scientists crap their pants!

    1. Re:Brown noise by menkhaura · · Score: 3, Funny

      Bah, rocket science isn't brain surgery!

      --
      Stupidity is an equal opportunity striker.
      Fellow slashdotter Bill Dog
    2. Re:Brown noise by definate · · Score: 3, Funny

      Exactly, it's not like it's rocket surgery!

      --
      This is my footer. There are many like it, but this one is mine.
  2. Good news! by bluephone · · Score: 5, Funny

    This means rocket science is once again hard. You may now resume saying "Well, this isn't rocket science" until they solve this.

    --
    jX [ Make everything as simple as possible, but no simpler. - Einstein ]
    1. Re:Good news! by fractoid · · Score: 3, Funny

      Bah, this isn't hard. These rockets are just getting speed wobbles, any 8-year-old boy with a bike will be able to tell you all about them!

      --
      Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
  3. I've been a member of slashdot for some time by JeanBaptiste · · Score: 5, Funny

    and the subject line for this article has finally convinced me that cowboy neal is in fact art bell.

  4. Vibrator?? by AmigaHeretic · · Score: 2, Funny

    Is that a rocket in your pocket? Finally I could satisfy a woman! :(

    1. Re:Vibrator?? by compro01 · · Score: 5, Funny

      of course. we've got lots of pictures. =D

      --
      upon the advice of my lawyer, i have no sig at this time
    2. Re:Vibrator?? by AmigaHeretic · · Score: 4, Funny

      >>>> Do you even know what a woman looks like?

      >>of course. we've got lots of pictures. =D

      Yeah, and I know all about womens emotions and stuff. Like, chicks HATE it when you call them broads.

  5. I can finally be of use to science by Profane+MuthaFucka · · Score: 5, Funny

    I wonder if they'd be interested in analyzing the smoking ruins of at least 5 toilet bowls I have personally destroyed with mysterious oscillating rocket powered sound waves.

    --
    Fascism trolls keeping me up every night. When I starts a preachin', he HITS ME WITH HIS REICH!
    1. Re:I can finally be of use to science by Tablizer · · Score: 5, Funny

      I wonder if they'd be interested in analyzing the smoking ruins of at least 5 toilet bowls I have personally destroyed with mysterious oscillating rocket powered sound waves.

      Oh great, Mr. Goatse himself is now posting on slashdot.

    2. Re:I can finally be of use to science by NevarMore · · Score: 4, Funny

      Oh great, Mr. Goatse himself is now posting on slashdot.


      Thats impossible. In order to get a good sound out of that it'd have to be a bit tighter and able to make a good PHHHHHHBBBBBTTT sound. The way Mr. Goatse is now it would just kind of go phooooo. Even then I doubt if there is enough of a seal left to keep it from leaking out long enough to build up sufficient volume and pressure to do anything noticable.
    3. Re:I can finally be of use to science by PitaBred · · Score: 5, Funny

      It scares me that you have devoted that much time thinking about the physics of that.

  6. What TFA leaves out by garett_spencley · · Score: 2, Funny

    When analyzing the acoustic oscillations scientists discovered something quite striking. The sine wave was exactly identical to the master recording of Britney Spears' "Hit Me Baby One More Time".

  7. Re:Defense System? by zappepcs · · Score: 4, Funny

    Ever watch the movie Dune?

    Moha deeb.... rocket go boom

  8. If you play them backwards by xs650 · · Score: 4, Funny

    If you record them and play them backwards they will install Vista on your computer.

  9. And then... by adona1 · · Score: 2, Funny

    Dr No will fish them out of the water and pass the rockets on to SMERSH....I don't like the sound of that!

    --
    Between the falling angel and the rising ape
  10. This has got to be joke by Riktov · · Score: 4, Funny

    Come on, an expert on rocket fuel technology named Professor Ben Zinn?

  11. Nigel Tufnel Explains by reSonans · · Score: 2, Funny

    *Blank stare* - "These go to eleven."

    --
    Light the blue touch-paper and retire immediately.
  12. Powerful sound waves? by gmuslera · · Score: 3, Funny

    Heavy Metal can destroy even rockets now.

  13. Addicted to bass... by roxtafari · · Score: 3, Funny

    Looks like an audio engineering issue. While not being a rocket engineer myself, I assume the combustion chamber is somewhat symmetrical. It is likely acting as a resonance chamber and increasing the amplitude of the soundwave to the point of physical damage. I shattered the rear window in my '96 Camaro twice with a 1200W Fosgate and a single 10" bazooka tube. Tell NASA to crack the window when they turn up the bass!

  14. Sonic Tools by Professr3 · · Score: 3, Funny

    So THAT'S how the Doctor's screwdriver works...