60 CYCLES (PER SECOND TIMING TRACE 
WAN NMA NA ANAABA TA Wiad Se A 
\ \ 
lit My vanstan VIVVU Vevey VWVVV iY SANG GAPUA CHARAN LS UVa MtiTAMVLVAGS4 Vaated VAAL VW WU VV VAN 
(a) SMALL LAMINAR OSCILLATIONS; TOWING SPEED V=1.25 KNOTS 
X-REYNOLDS NUMBER, Rx = fa X 105 
AAA 
(b) INCEPTION OF TRANSITION; V=1.49 KNOTS, Rx=6.15 X 10? 
Pe SSSA GSVHCU EER MCCIQIIUCG SOO NGO NORTE ES 
(c) TRANSITIONAL FLOW; V=1.74 KNOTS; Rx= 7.18 X - 
Av enNANNA AK AAAAAAL NANHAAAA A NAA WAN SAAN AA VW WM WW WN AKAN ANA A AA SUARWAAKAAAAA COL NAAR ARAN, 
| \ e | 
vi NAVA h vo cer slaiinabieteseva bees duet ae, VW VV Vivien cual 
(d) TURBULENT LAYER; V=1.99 KNOTS; Rx= 8.21 X 109 
SALA AANA AAAS AN AMAA AAP 
er Ne 
(e) TURBULENT LAYER; ae 2.25 ce Ry = 929 X 105 
PONT N NAN ANANNAAAA AAA AA AANA A KAVUN NAKA AA AAW AAA yaaa NAKA AAA AA AAM AAR AR AAA AMAA AY HANA MAAN A AAA AQAA AMAA AAA AA 
ATA VAVIERRE Seu Grtvecaiwiet VVN FOU UCR CCG UCR III VV VW WWHVUEV EVN ENVY VEN VEKEV VU OLORIGbEb bi el 
C2) HGH FREQUENCY TURBULENCE; DECREASE IN AMPLITUDE ‘Is 
PARTLY CAUSED BY LAG EFFECT OF HOT WIRE Hae WAS NOT 
COMPENSATED; V=3.50 KNOTS; Ry=1e44 X 1 
FIGURE 9: OSCILLOGRAPH RECORDS OF HOT WIRE RESPONSE TO 
VELOCITY FLUCTUATIONS IN THE BOUNDARY LAYER OF 
A THIN, FLAT PLATE TOWED IN WATER. HOT WIRE 
WAS LOGATED 3 FEST AFT OF FORWARD EDGE OF 
PLATE. 
DAVID W. TAYLOR MODEL BASIN WASHINGTON, D. C. OCTOBER 48 
