aerodynamics questions and suggested answers 9
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GMJQCXD JANQPQXAPMME LAJMEDJMC
QEDWAP_DXD XAJEICIFD LMCMT_DM
RARAPDJ_MME _ALA_XAP HQM
_A_D 0226/2;
JIH LMXM RACMNMPME > _LG ????
EMLM LMXM RACMNMPME > MAPIHTEMLDO_
JQP_Q_ > ? _LX
LM_M > 0 kiurs ?2 ldeutas
XMPDJK > Eival`ar 0226
MPMKME JARMHM OMCIE>
Meswar 8 quastdies.
JAPXM_ _IMCME DED XAPHDPD HMPDRMHM LQJM _QPMX
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]uastdie =
_kiw tkmt wkara w < g(z) ds m oilpcax pitaetdmc gueotdie. Qsdef trmesgirlmtdie ig tka
girl , wkara , skiw tkmt tka gciw ivar m odroca ig rmhdus m(wkara ) ome `a
trmesgirlah deti tka gciw ivar me accdpsa. M eul`ar ig drritmtdiemc gciws mra fdvae `y oilpcaxpitaetdmc gueotdie de tka usumc eitmtdie ms gicciws>
(d) (dd) (ddd)
Gdeh tka straml gueotdie meh tka pitaetdmc gueotdie gir tkasa oilpcax pitaetdmc gueotdies meh
hasord`a tka gciw raprasaetah `y amok gueotdie.
Meswars>
,
Gciw mriueh oycdehar wdtk rmhdus mds fdvae `y
M odroca ig rmhdus m, wdcc trmesgirl usdef ms gicciws,
Qsdef racmtdieskdp ois0"+ sde
0"
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d)
meh
Qedgirl gciw mcief x-mxds
dd)
, meh
_iuroa gciw gril tka irdfde
ddd)
, meh
Hiu`cat gciw
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]uastdie 0
Pagar ti tka dccustrmtdie ig gciw mriueh m oycdehar de Gdf. =. Xka straml-gueotdie gir devdsodh gciw
mriueh m oycdehar ds fdvae ms>
Xka rmhdmc meh mxdmc vaciodtdas mra fdvae `y>
.
Gdfura =.
(d) Omcoucmta tka rmhdmc meh mxdmc vaciodty. _tmta tka lmxdlul vaciodty meh tka pisdtdie(s) dt
ioours9 _tmta tka pisdtdie(s) ig tka stmfemtdie pidet(s).
(dd) Rriva tka oycdehar kms ei cdgt.
Lmxdlul vaciodty ioours wkae
d.a meh d.a ,
Mt stmfemtdie pidet meh
_dluctmeaius sicvdef gir , fdvas ,
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Dg tka oycdehar kms ei cdgt, wkdok lames tka virtdodty ds zari.
Wirtdodty,
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Ds tka smla ms giurdar oisdea sardas wkara,
wkara meh
Xkaragira
,
Lilaet oiaggdodaet m`iut tka qumrtar okirh (priva)
ds dehapaehaet ig !, si tka qumrtar okirh ds tka tkairatdomc m.o.
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_aoieh pmrts
Oilpmra ti
Xkaragira
Detafrmta
wdtk ,wkae
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Oaetar ig prassura
Ms `agira
Vkae gdxah mt marihyemldo oaetar,
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]uastdie 1
Oiesdhar me deoilprassd`ca gciw, cmldemr `iuehmry cmyar friwdef mcief tka surgmoa ig m gcmt pcmta,
wdtk m okirh caeftk o, ms sjatok de Gdf. 0.Gir me deoilprassd`ca gciw, cmldemr, gcmt pcmta `iuehmry
cmyar, tka `iuehmry cmyar tkdojeass "mt tka trmdcdef ahfa ig tka pcmta ds
Meh tka sjde grdotdie hrmf oiaggdodaet gir tka pcmta ds
Vkara Payeichs eul`ar ds `msah ie okirh caeftk,
Gdfura 0
Mssula tkmt tka vaciodty prigdca tkriufk tka `iuehmry cmyar ds fdvae `y m piwar-cmw vmrdmtdie
Omcoucmta tka vmcua ig e, oiesdstaet wdtk tka degirlmtdie fdvae m`iva.
Qsdef tka ciwar vmcua ig e, hatarldea wkatkar tka gciw ds ritmtdiemc ir drrdtmtdiemc.
Meswar> Ciij mt Axmlpca 0.0
o
Waciodt rigdca
u
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Vdtk
Vdtk ciwar vmcua ig e
Xka gciw ds drritmtdiemc dg . Ciij mt axmlpca 0.1. Xka gciw ds ritmtdiemc.
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]uastdie 7
M Niujiwsjd mdrgidc ds girlah `y hdspcmodef m odroca ig rmhdus = `y !x< -2.2; (ramc mxds) meh !y
wkara
,
.ir
Xka mppriprdmta virtax straeftk ti dlpisa tka Juttm oiehdtdie lust `a hatarldeah. Oiesdhar tka
cdgtdef gciw m`iut m oycdehar. Xka vaciodty de tka #hdraotdie ds,
wkae
Kara,Pds tka rmhdus ig tka oycdehar surgmoa.
Xkds vaciodty ds zari ie tka surgmoa ig tka oycdehar mt tka stmfemtdie pidets. Mt tka tkasa pidets.
x
y
#2.21
-2.2;
oycdehar
stmfemtdie
pidet
`
x
yz pcmea
-#
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Dg tka gdach ds ritmtah `y !ti sdlucmta me mefca ig mttmoj,
_deoa tka okirh caeftk ig tka Niujiwsjd mdrgidc ds 8`, tka cdgt oiaggdodaet ome `a wrdttae,
Lmjdef tka mssulptdie tkmt `$P,
` < 2.4=;6
m) Wirtax straeftk "dg !< 2i, meh W"< 02 l/s
$< 8%W"P&sde(!+')< 8%(02)(=)sde(0.;6) < =0.177
`) OCmt !< 2imeh !< =2i
OC< 0%sde(0.;6) < 2.?=8=1
OC< 0%sde(=2 + 0.;6) < =.82