From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Supplement to a report on oil temperature, clarifying friction losses and heat transfer experiments on a Phantom engine.
| Identifier | ExFiles\Box 69\4\ scan0358 | |
| Date | 19th October 1927 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/ACL. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} HS{Lord Ernest Hives - Chair}/ACL1/LG19.10.27. SUPPLEMENT TO REPORT ON OIL TEMPERATURE. (ref. Hs{Lord Ernest Hives - Chair}/ACL1/LG17.10.27.) Since writing the above report we have made a few additions to the heat distribution or energy diagram, and while some are not directly connected with the oil temp. problem, they supply more complete information of the conditions of the tests. In the previous diagram the amount called 'friction losses' was understood to include those losses due to pumping. In the later diagram this has been made clearer. We have not separated the friction from the pumping losses, although this could be accomplished with the aid of an indicator diagram, as at present we have not thought this to have sufficient bearing on the problem in hand to be worth undertaking. With regard to the area representing the heat given to the jacket water due to the piston friction, it may be suggested that this is not so much due to friction as the heat of compression. We have however results of a number of experiments taken on a Phantom engine which disprove that any appreciable heat is given to the water due to compression, but rather that heat is abstracted from the water. The results were taken from tests with a cyl. work-ing on air only. The temps. of the air entering the cyl. and leaving again after compression were taken for different jacket water and inlet air temps. It was found that under normal conditions the air gained heat from the water. If however the inlet air temps. were higher than the water temp. the air naturally contd:- | ||