GNU Free Documentation License . .

: ,

. , . 1,225 ⁄3, 15° .

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.


( . )
\vartheta, c, ·1 ρ, ·3 Z, ··3
+35 351,96 1,1455 403,2
+30 349,08 1,1644 406,5
+25 346,18 1,1839 409,4
+20 343,26 1,2041 413,3
+15 340,31 1,2250 416,9
+10 337,33 1,2466 420,5
 +5 334,33 1,2690 424,3
 ±0 331,30 1,2920 428,0
 -5 328,24 1,3163 432,1
-10 325,16 1,3413 436,1
-15 322,04 1,3673 440,3
-20 318,89 1,3943 444,6
-25 315,72 1,4224 449,1

[] ,

:

\rho = \frac{p \cdot M}{R \cdot T} \,

ρ , M (29- ),p , R , T . :

  • ( 0 °, 100 , ) 1,2754 ⁄3;
  • 20 °C, 101,325 1,2041 ⁄3.

, , ( 101,325 )

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, . , (18 ⁄) (29 ⁄).[1] , .[2] 0,2% 10 °C 50 °C :[2]

\rho_{\,\mathrm{humid~air}} = \frac{p_{d}}{R_{d} \cdot T} + \frac{p_{v}}{R_{v} \cdot T} \,

\rho_{\,\mathrm{humid~air}} (⁄3); p_{d} (); R_{d} (287,058 ⁄(·)); T (K); p_{v} () R_{v} (461,495 ⁄(·)). :

p_{v} = \phi \cdot p_{\mathrm{sat}} \,

p_{v} ; \phi p_{\mathrm{sat}} , :[2]

p(mb)_{\mathrm{sat}} = 6.1078 \cdot 10^{\frac{7.5 \cdot T-2048.625}{T-35.85}}

. p_{d} :

p_{d} = p-p_{v} \,

p .

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, (p0=101325 , T0=288,15 K, \rho_0=1,225 /³).

( ­ ):

  •   p0 = 101325 ;
  •   T0 = 288,15 K;
  •   g = 9,80665 ⁄2 ( );
  •  (.). ,   L = 0,0065 K⁄;
  •   R = 8,31447 ⁄(·K);
  •   M = 0,0289644 ⁄.

(   , ) h :

T = T_0 - L \cdot h \,

h:

p = p_0 \cdot \left(1 - \frac{L \cdot h}{T_0} \right)^\frac{g \cdot M}{R \cdot L}

h T P :

\rho = \frac{p \cdot M}{R \cdot T} \,

( , ) , .   . «» ( ) .

[] .

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  1. , , , , .
  2. 1 2 3  (.) Equations - Air Density and Density Altitude

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