New Test Facility for the Study of Interacting Pressure Waves and Their Reduction211 in Tunnels for High Speed Trains

摘要

The National Aerospace Laboratory NLR in the Netherlands recently developed a211u001etest facility that provides duplication of the interacting pressure waves in 211u001erailway tunnels on model scale at realistic conditions. In this facility it is 211u001epossible to launch train models with a diameter of 20 mm and a length up to 2.5 211u001emeters (scale approximately 1:175) at velocities up to 500 km/hr. After its 211u001elaunch, the train model is guided through a tunnel model of typically 20 sq. cm. 211u001ecross section and length of 10 meters. The tunnel model has a flexible layout, 211u001eallowing easy variation of the cross section (tunnel blockage ratio) and entry 211u001econfigurations. The pneumatic launch system, the guidance of the train model and 211u001emeasurement techniques will be described in detail and some test results will be 211u001eshown.