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Re: O Chelyabinskom "fenomene"
12.04.2013 23:41 | Gennadii Ivchenkov
Ne obizhaites'. V svoe vremya obsuzhdaya Tungusskii meteorit ser'eznye uchenye govorili, chto on vzorvalsya kak parovoi kotel, chto yavlyaetsya otkrovennoi chepuhoi (vidimo, drugih ob'yasnenii u nih ne bylo).
Naschet goreniya. Uproshenno, eto ekzotermicheskaya himicheskaya reakciya idushaya na poverhnosti tela (dlya tverdogo topliva, naprimer, uglya) ili idushaya posloino v gazovoi srede (cilindr motora). Pri etom zona goreniya posledovatel'no progrevaet sleduyushuyu zonu do temperatury nachala reakcii. Naprimer, v cilindre gorenie raspostranyaetsya ot svechi. V dizele pri szhatii voznikayut zony goreniya, kotorye rasshiryayutsya (toplivo v cilindre dizelya odnovremenno ne zagoraetsya!). Tak kak gorenie ide' posloino (process idet s nekotoroi zaderzhkoi), to skorost' raspostraneniya zony goreniya otnositel'no nebol'shaya, ne sozdayushaya nakoplenie davleniya vo vneshnei srede. Eto otnositsya i tverdym raketnym toplivam (tam process poslozhnee, no pohozhii). Gorenie vzryva ne vyzyvaet, esli tol'ko tot zhe chernyi ili piroksilinovyi poroh, naprimer, ne pomestit' v obolochku, gde davlenie produktov goreniya budet povyshat'sya do razryva obolochki.
Detonaciya zhe vyzyvaetsya moshnoi akusticheskoi volnoi, prohodyashei v tverdoi (TNT), zhidkoi (nitroglicerin) ili gazovoi (gremuchii gaz) srede. Detoniruyut metastabil'nye veshestva, soderzhashie i goryuchee i okislitel', molekulam kotoryh dlya nachala reakcii nuzhno preodolet' nekii energeticheskii bar'er, to est' ee vozbudit', chto i delaet moshnaya akusicheskaya volna, prohodyashaya v veshestve so skorost'yu poryadka 1 km/sek. To est' VSE tverdoe veshestvo prevrashaetsya v gaz prakticheski mgnovenno. Davlenie v moment vzryva dostigaet tysyach atmosfer i voznikaet udarnaya volna, tak kak atmosfera na uspevaet "perevarit'" takoe postuplenie gaza. Udarnaya volna raspostranyaetsya so skorost'yu zvuka i yavlyaetsya kak by obolochkoi.
Vse eto ochen' uproshenno, processy eti dovol'no slozhnye.
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- O Chelyabinskom "fenomene"
(A. I. Eremeeva/GAISh, Moskva,
25.03.2013 12:18, 7.9 KBait, otvetov: 18)
Posle «vzryvnogo» potoka... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
30.03.2013 0:33, 2.3 KBait)
Chelyabinskii meteorit - eto pochti navernyaka mladshii brat Tungusskogo.... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
30.03.2013 11:05, 607 Bait, otvetov: 2)
Bez vsyakogo zaum'ya... - Re[2]: O Chelyabinskom "fenomene"
(A. V. Malkin,
30.03.2013 15:55, 8 Bait, otvetov: 1)
Konechno. - Re[3]: O Chelyabinskom "fenomene"
(M. A. Surin,
2.04.2013 17:22, 469 Bait)
Damy, gospoda. Na poslednem seminare v CIAM M.Ya.... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
30.03.2013 16:53, 230 Bait)
Potomushta... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
12.04.2013 5:02, 570 Bait)
V svoe vremya (ochen', ochen'... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
12.04.2013 8:36, 949 Bait)
Odnoznachno rasskazyvaite, naprimer moi poznaniya... - >> Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
12.04.2013 23:41, 1.9 KBait)
Ne obizhaites'. V svoe vremya... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
13.04.2013 9:05, 644 Bait)
To chto Vy napisali... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
13.04.2013 9:25, 969 Bait)
\\\V svoe vremya obsuzhdaya Tungusskii... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
14.04.2013 22:24, 3.1 KBait)
Vasya... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
14.04.2013 22:26, 3.1 KBait)
Vasya... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
15.04.2013 1:02, 2.1 KBait)
Vy dazhe ne dogadyvaetes'... - Re: O Chelyabinskom "fenomene"
(A.P. Vasi,
15.04.2013 1:20, 864 Bait)
Ya vot pomnyu opyt kogda... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
22.04.2013 21:59, 385 Bait)
Chego-to chelyabinskie meteority razletalis'. K chemu by eto?... - Re: O Chelyabinskom "fenomene"
(S. I. Gordeev,
27.05.2013 7:03, 117 Bait)
Chelyabinskii fenomen po traektorii bol'she pohozh na neudachnyi zapusk rakety.... - Re: O Chelyabinskom "fenomene"
(Gennadii Ivchenkov,
9.09.2016 22:48, 1.2 KBait, otvetov: 1)
Plamya vzryvayushihsya (detoniruyushih) meteoritov IMEET ZELENY' CVET.... - Re[2]: O Chelyabinskom "fenomene"
(O. A. Stolova,
19.11.2016 15:22, 313 Bait)
Spasibo za mneniya o o fenomene....