challenges

(example)

response

(example)

understand the big picture

what is the overall temperature distribution?

full field imaging

ir camera; liquid crystals

understand your objective

what question am i trying to answer?

�

play devil’s advocate to develop a useful question

“when can i use ----?”� today!

or

�“under what conditions-----?”

understand your instrumentation

what kinds of errors might affect my instruments?

get experience – either real or by education

quick scan of literature, new and old.

find a mentor.

understand the flow

where is the coolant flow going, most likely?

visualize the flow

smoke lines, tufts, threads

pitfalls

(example)

to avoid

(example)

relying on sparse data

using one tc to measure cooling air temperature

use redundancy

uniform?��� use at least 2 tc’s

linear?������ use at least 3 tc’s

not base-lining the system

looking only at “troublesome” data

turn the world on a piece at a time

1^st scan: no air, no power

2^nd scan: air but no power

3^rd scan: normal system, full on

4^th scan: troublesome system

generalizing too much

treating a single occurrence as typical

make sure the problem you are addressing is real, and know when it arises

repeat with variations: when is there a problem, when is there not a problem

working in the noise

relying on data from tests with small temperature differences

be aware of the relative uncertainty in your result