aerodynamics questions and suggested answers 9

8/13/2019 Aerodynamics Questions And Suggested Answers 9

1/12

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


2/12

]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 à

trmesgirlah deti tka gciw ivar me accdpsa. M eulàr 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

hasordà 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"


3/12

d)

meh

Qedgirl gciw mcief x-mxds

dd)

, meh

_iuroa gciw gril tka irdfde

ddd)

, meh

Hiu`cat gciw


4/12

]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 ,


5/12

Dg tka oycdehar kms ei cdgt, wkdok lames tka virtdodty ds zari.

Wirtdodty,


6/12

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.


7/12

_aoieh pmrts

Oilpmra ti

Xkaragira

Detafrmta

wdtk ,wkae


8/12

Oaetar ig prassura

Ms `agira

Vkae gdxah mt marihyemldo oaetar,


9/12

]uastdie 1

Oiesdhar me deoilprassd`ca gciw, cmldemr ìuehmry 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 ìuehmry

cmyar, tka ìuehmry cmyar tkdojeass "mt tka trmdcdef ahfa ig tka pcmta ds

Meh tka sjde grdotdie hrmf oiaggdodaet gir tka pcmta ds

Vkara Payeichs eulàr ds `msah ie okirh caeftk,

Gdfura 0

Mssula tkmt tka vaciodty prigdca tkriufk tka ìuehmry cmyar ds fdvae `y m piwar-cmw vmrdmtdie

Omcoucmta tka vmcua ig e, oiesdstaet wdtk tka degirlmtdie fdvae mìva.

Qsdef tka ciwar vmcua ig e, hatarldea wkatkar tka gciw ds ritmtdiemc ir drrdtmtdiemc.

Meswar> Ciij mt Axmlpca 0.0

o

Waciodt rigdca

u


10/12

Vdtk

Vdtk ciwar vmcua ig e

Xka gciw ds drritmtdiemc dg . Ciij mt axmlpca 0.1. Xka gciw ds ritmtdiemc.


11/12

]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

-#


12/12

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

aerodynamics questions and suggested answers 9

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