1432 
with a, as speed of sound in the undisturbed medium and 
-5 -! 
é ORE Go's On al (3) 
In Ref. 4 a numerical value of 1.1 x lone at x was given 
for ea using earlier measurements only. 
In addition to D, the value for speed of sound in the 
medium behind the shockwave is needed. It can be derived in the 
following way: 
The temperature rise behind the shockwave front (see Ref. 4, 
page 9) can be derived 
ae Bele Na iz 
<p 
and therefore the medium behind the first shockwave can be des- 
cribed by the equation of state: 
oon (i eeeee she _ gyre (EE* - A 
2/2 
Since az = Ks) a » there is 
a 
baFian ® 192 nt goetn ora resien ABM 70? os 
as” Mihint fo 0 SeleMe i oe ED 
kK Cy K Cp & 
and with the above mentioned relation between v and Vo? 
ara, {i+ (2u- -k) 7} (4) 
The speed of flow behind the shockwave with an amplitude a can 
be found easily with the relation 7 = So toU ; 
