Download Aircraft Manual - Hurricane I - Merlin II Engine [Air Pub PDF

Read or Download Aircraft Manual - Hurricane I - Merlin II Engine [Air Pub 1564A Vol I] (Air Ministry PDF

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Extra info for Aircraft Manual - Hurricane I - Merlin II Engine [Air Pub 1564A Vol I] (Air Ministry

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3978. 11) I 3. The enthalpy departure function at the T, and P, of interest is determined from ! ’ The Lee-Kesler method was used to calculate the heat of vaporization at the same temperatures as Masi’s data. 2. 20650 was obtaimed. 20650(H - HO),-, . Use of the above equation forces the heat of vaporization values calculated by the Lee-Kesler method to agree with Masi’s data. 2. Heat of Vaporization Values AK W/kg) Temperature (K) Masi (AEI&. 211719 . ) . , UraniumHexafluoride:A Surveyof the Physico-Chemical Properties,GAT280.

They recommend the following correlation for enthalpy departure of a superheated vapor mP,l Ho - H = T, -x i exP[-C,P,2lY P, = reduced pressure. 5) J 36 The variables C,, C,, C,, C,, C,, C,, X0, and m are dependent on the values of reduced temperature and critical compressibility (2,). 29. 6) where D,, D,, Dj, and D, are dependent on the value of 2, (see Reference 8). It should be noted that the Yen-Alexander correlations have several discontinuities at various values of reduced temperatures, which could lead to numerical difficulties.

37 0 36 0 35 0 34 200 400 600 800 Temperature 1000 1200 (K) Fig. 1. Low pressure heat capacity of UF, vapor. 1400 1600 4 -- 2% i +7 T,‘V,’ and where v, = reduced volume. 3 The constants B, C, and D are given by the following expressions . 6) D = d, + d,/T, . The isochoric heat capacity departure function appearing in Eq. 2 is defined as c, - c,” R 35 2 (b3 + 3b,/T,) ---6E, = T2V T,3V,!

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