TY - JOUR
AU - Skoblin, G.
AB - KEEPING THE WATER SURFACE OPEN AHEAD OF SPILLWAY GATES BY MEANS OF AIR-BUBBLING APPARATUS UDC 627.54.627.835.621.532.3 G. A. Skoblin Severe climatic conditions in the construction locality in question posed a series of complex technical problems for the planners and site engineers, including the question of keeping the water surface open ahead of the spillway so as to relieve the static pressure of the ice on the sector gates. The first scheme to keep the water open relied on a blower to supply air through perforated tubeshung parallel to the plane of each gate on the upper water side, level with the dam still. The principle involved is the creation on the water surface (by emission of air) of sufficient flow velocities to.prevent formation of an ice cover. Trials revealed the unsuitability of this arrangement for the conditions in question. There was no thawing effect, but rather an increase in the ice cover due to supercooling of a layer of water with a temperature close to 0*C. The second suggestion put forward by the planning organization was to employ floating shields with fitted nichrome wire heaters. This likewise proved ineffective because the density of the water directly adjoining the wire 
TI - Keeping the water surface open ahead of spillway gates by means of air-bubbling apparatus
JF - Power Technology and Engineering (formerly Hydrotechnical Construction)
DO - 10.1007/BF02378157
DA - 2006-03-22
UR - https://www.deepdyve.com/lp/springer-journals/keeping-the-water-surface-open-ahead-of-spillway-gates-by-means-of-air-Le8BOjnTHv
SP - 335
EP - 337
VL - 3
IS - 4
DP - DeepDyve
ER -