. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. WATER-PUMPING BY CHAETOPTERUS 143 AXIAL PARAMETERS POWER RECOVERY ,.. i—1 sec- LU E U u Q. LO. LU Z o LU (J U ib r\ vy r\ V \ FIGURE 9. Characteristic maximum axial displacements of the pump segment periphery during 3 consecutive pump cycles. Modal characteristics for radial displacements are shown in Figure 10. The displacements here are clearly asymmetric, with the centrifugal movement limited by the inner margin of the tube wall. Although the total distances moved radially by the margins of the piston segments are less th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. WATER-PUMPING BY CHAETOPTERUS 143 AXIAL PARAMETERS POWER RECOVERY ,.. i—1 sec- LU E U u Q. LO. LU Z o LU (J U ib r\ vy r\ V \ FIGURE 9. Characteristic maximum axial displacements of the pump segment periphery during 3 consecutive pump cycles. Modal characteristics for radial displacements are shown in Figure 10. The displacements here are clearly asymmetric, with the centrifugal movement limited by the inner margin of the tube wall. Although the total distances moved radially by the margins of the piston segments are less than ^ of the distance moved axially, the radial movements are at least twice as rapid as the axial — as seen in the derived velocity /acceleration curves. Simultaneous plots of the axial and radial displacements yield the trajectories shown in Figure 11 A. In order to evaluate the changes in shape which occur, selected frames from one complete pump cycle were projected and drawn in superimposed positions. Since no sig- nificant differences among the segments could be detected, the shape changes for only one segment are given in Figures 11B and 11C, for clarity. These latter figures clearly indicate the shape changes to be great, in spite of the fact that at all times during the pump cycle the piston segments remain nearly circular in cross- section. During the power phase, the mobile portion of a piston segment assumes a geometry which loosely approximates a biconvex disk. The inner wall of the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
