Blackbird intake

[Speed]

My apologies if this is the wrong group. Please direct me to the right
one if it is.

I'm a mechanical engineering student who is interested in how the
intake system works on the SR-71. I've seen many articles on the
internet that mention it briefly, and give a simplified explanation,
but that's not what I'm looking for.

I'm looking for an explanation/description that's geared towards
someone who has a degree in mechanical engineering with a concentration
in compressible flow. If anyone could tell me of a place to find a
good technical description, I would greatly appreciate it.

Thanks,

--CS

[jsmith]

As I understand it, the intake spike moves fore and aft to control the
shock waves before they enter they compressor (?) stages.

Speed wrote:
> My apologies if this is the wrong group. Please direct me to the right
> one if it is.
>
> I'm a mechanical engineering student who is interested in how the
> intake system works on the SR-71. I've seen many articles on the
> internet that mention it briefly, and give a simplified explanation,
> but that's not what I'm looking for.
>
> I'm looking for an explanation/description that's geared towards
> someone who has a degree in mechanical engineering with a concentration
> in compressible flow. If anyone could tell me of a place to find a
> good technical description, I would greatly appreciate it.
>
> Thanks,
>
> --CS
>

[William W. Plummer]

Speed wrote:
> My apologies if this is the wrong group. Please direct me to the right
> one if it is.
>
> I'm a mechanical engineering student who is interested in how the
> intake system works on the SR-71. I've seen many articles on the
> internet that mention it briefly, and give a simplified explanation,
> but that's not what I'm looking for.
>
> I'm looking for an explanation/description that's geared towards
> someone who has a degree in mechanical engineering with a concentration
> in compressible flow. If anyone could tell me of a place to find a
> good technical description, I would greatly appreciate it.

There used to be a web sited specifically for SR-71 mechanics. I can't
remember the URL but perhaps you can find it with Google.

[Skywise]

"Speed" > wrote in news:1116951522.419532.138010
@z14g2000cwz.googlegroups.com:

> My apologies if this is the wrong group. Please direct me to the right
> one if it is.
>
> I'm a mechanical engineering student who is interested in how the
> intake system works on the SR-71. I've seen many articles on the
> internet that mention it briefly, and give a simplified explanation,
> but that's not what I'm looking for.
>
> I'm looking for an explanation/description that's geared towards
> someone who has a degree in mechanical engineering with a concentration
> in compressible flow. If anyone could tell me of a place to find a
> good technical description, I would greatly appreciate it.
>
> Thanks,
>
> --CS

Don't know if this is techinical enough for you....

"Supersonic Engine Inlets"
http://142.26.194.131/aerodynamics1/High-Speed/Page7.html

Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism

Home of the Seismic FAQ
http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html

Sed quis custodiet ipsos Custodes?

[David O]

"Speed" > wrote:

>My apologies if this is the wrong group. Please direct me to the right
>one if it is.
>
>I'm a mechanical engineering student who is interested in how the
>intake system works on the SR-71. I've seen many articles on the
>internet that mention it briefly, and give a simplified explanation,
>but that's not what I'm looking for.
>
>I'm looking for an explanation/description that's geared towards
>someone who has a degree in mechanical engineering with a concentration
>in compressible flow. If anyone could tell me of a place to find a
>good technical description, I would greatly appreciate it.
>
>Thanks,
>
>--CS


Craig,

You might post your question to rec.aviation.military. Also, the
moderated newsgroup sci.aeronautics could prove helpful if you have
specific technical questions about the J58 inlet design.

Here is an article supplement from the Smithsonian's Air & Space
magazine detailing the J58 inlet,

http://www.airandspacemagazine.com/ASM/Mag/Supp/FM99/oxcart.html

If you search the NACA technical report server
(http://naca.larc.nasa.gov/) you'll find a number of technical reports
detailing the aerodynamics of supersonic spike diffuser inlets. Here
are some suggested search phrases,

supersonic inlet
supersonic conical inlet
supersonic spike inlet
translating spike supersonic inlet

Lastly, you could search the NASA technical report server using
similar search terms, http://ntrs.nasa.gov/

The NACA and NASA technical report servers sometimes return nothing or
refuse connection when demand is high. In such a case, just come back
later.

Have fun,

David O -- http://www.AirplaneZone.com

[Michael Houghton]

Howdy!

In article . com>,
Speed > wrote:
>My apologies if this is the wrong group. Please direct me to the right
>one if it is.
>
>I'm a mechanical engineering student who is interested in how the
>intake system works on the SR-71. I've seen many articles on the
>internet that mention it briefly, and give a simplified explanation,
>but that's not what I'm looking for.
>
>I'm looking for an explanation/description that's geared towards
>someone who has a degree in mechanical engineering with a concentration
>in compressible flow. If anyone could tell me of a place to find a
>good technical description, I would greatly appreciate it.
>
The description that sticks in my mind goes like this:

The spike moves in and out to make the shock wave fall just inside
the rim of the inlet. The shock wave zig-zags down the annular
passage that bypasses the turbojet core, doing the ramjet thing.
Somewhere in the back, go-juice gets added to the now hot and
compressed air before it gets to the nozzle.

It's a very qualitative description, and I may have some of the
details wrong, but I'm not an aerospace engineer, nor do I play
one on TV, nor did I stay at a Holiday Inn Express last night,
so YMMV. :-)

yours,
Michael


--
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