Channel Tunnel stock aerodynamic tests 1990
|An experiment to assess the
damage/distortion of soft containers in channel tunnel cross flows
simulated by a jet engine
During Channel Tunnel operation, airflows pass through the Pressure Relief Ducts from one running tunnel to the other. These can be substantial and impinge on the side of passing trains. Concern had been expressed about the adverse effects that this could have on certain types of less robust freight wagons, for example, curtain-sided and other types of swap body containers.
In order to assess the consequences of such flows on the design integrity of these structures, a train consisting of a selection of these wagons and containers was subjected to a simulation of the PRD exhaust flow by running the train through the efflux of a jet engine. The test was carried out in the open-air and was intended only to simulate the consequences of the direct impingement of the PRD flow.
The test train consisted of a class 47 loco hauling a train of the following BR and SNCF vehicles
The train was allowed to run up to 60 mile/h
Click on the picture for a bigger image all photos BR Official except where indicated.
|Train consist as above||Avon jet engine and pressure relief duct mock up was set up south of the Test Centre at Old Dalby|
|Test site arrangement||Aero engine and pressure relief duct mock up|
|Test train passing the test site||Test train passing the test site|
|Inspecting the test train|
It was concluded that further test were required and that future designs of similar vehicles should also be tested. Swap bodied and curtain sided vehicles should not be run through the Tunnel nor should open sided car carriers
Sorry about the poor quality photos but I cannot source better ones at the moment
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