我想知道溼度影響聲速的的關係
請把公式寫出來還有資料的來源....
我是說在參考書籍裡面的喔!!
2006-05-19 05:55:57 · 1 個解答 · 發問者 autumn 2 in 科學 ➔ 其他：科學
溼度高則音速會高一點,下表是在不同溫度下,不同相對溼度的音速對照表.數據來自實際量測.溫度0oC時,溼度的貢獻度很微小,但是隨著溫度升高,溼度對音速的影響愈來愈大.M/SRH%T DegC1020304050607080900331.5331.5331.5331.6331.6331.6331.7331.7331.75334.5334.6334.6334.7334.7334.7334.8334.8334.910337.5337.6337.7337.7337.8337.9337.9338.0338.015340.5340.6340.7340.8340.9341.0341.1341.2341.220343.5343.6343.7343.9344.0344.1344.2344.4344.525346.4346.6346.8347.0347.1347.3347.5347.6347.830349.4349.6349.9350.1350.3350.5350.8351.0351.2至於音速的理論計算值,可由下面網站算出.http://gsd.ime.usp.br/~yili/SpeedOfSound/Speed.htmlf (t, p, xw, xc) = a0 + a1 t + a2 t2 + (a3 + a4 t + a5 t2) xw + (a6 + a7 t + a8 t2) p + (a9 +a10 t +a11 t2) xc + a12 xw2 + a13 p2 + a14 xc2 + a15 xw p xc where the t is the celsius temperature, p is the pressure, xw is the water vapor mole fraction, and xc is the carbon dioxide mole fraction. The coefficients are: a0 = 331.5024 a1 = 0.603 055 a2 = -0.000 528 a3 = 51.471 935 a4 = 0.149 587 4 a5 = -0.000 782 a6 = -1.82 * 10-7 a7 = 3.73 * 10-8 a8 = -2.93 * 10-10 a9 = -85.209 31 a10 = -0.228 525 a11 = 5.91 * 10-5 a12 = -2.835 149 a13 = -2.15 * 10-13 a14 = 29.179 762 a15 = 0.000 486 xw = h f psv / p where h is the relative humidity expressed as a fraction, f is the enhancement factor, and psv is the saturation vapor pressure of water vapor in air. f = 1.000 62 + 3.14 * 10-8 p + 5.6 * 10-7 t2 and psv = exp (1.281 180 5 * 10-5 T2 - 1.950 987 4 * 10-2 T + 34.049 260 34 - 6.353 631 1 * 103 / T) Pa The above equations are only valid over the temperature range 0 C to 30 C.
2006-05-23 02:26:11 · answer #1 · answered by emcsolution 7 · 0⤊ 0⤋