slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Maťa Drapova GJAR TMF-team 2013 PowerPoint Presentation
Download Presentation
Maťa Drapova GJAR TMF-team 2013

Loading in 2 Seconds...

  share
play fullscreen
1 / 14
lot

Maťa Drapova GJAR TMF-team 2013 - PowerPoint PPT Presentation

139 Views
Download Presentation
Maťa Drapova GJAR TMF-team 2013
An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Maťa Drapova GJAR TMF-team 2013

  2. Firehose Consider a hose with a water jet coming from its nozzle. Release the hose and observe its subsequent motion. Determine the parameters that affect this motion.

  3. Teoretically Waterjetflowing in thehose, whatishappening: • waterfillthehosecompletely • thehoseisunderpressure • tries to get straight

  4. Practically Whatwe’vegot: Whatwedid: wecomposedthehoose to folds (1-7) wemadevariousspiralswithdifferentsdiameters or coils (6-22) we let thehosebehaveunderdifferentspressures

  5. Thenwe just leftitbehave:

  6. Practically • fluid mechanicstheory • redpointers = arrows • forceisthereasonforthechangeofthedirectionofthemove(notchangeofmove) • equal and oppositeforces

  7. type „C“

  8. type „B“

  9. Conclusion Timeoffilling[s] - graph of the dependence of time of filling the hose and number of foldwedid - weseethattheincreased diameter (and volume) affectedthetimeoffilling

  10. Sources: • http://www.ehow.com/facts_6940037_fire-recoil-water-turned-on_.html • http://physedu.science.upjs.sk/kvapaliny/rovkonti.htm • http://www.off-ladhyx.polytechnique.fr/publications/documents/doare2002rp-2pp.pdf • http://www.newton.dep.anl.gov/askasci/phy99/phy99x11.htm

  11. SPECIAL THANKS TO: Prešovský hasičský a záchranársky zbor ul. Požiarnická Prešov