TY  - JOUR
TI  - Roughness Coefficient of a Highly Calcinated Penstock
AB  - When highly calcinated water is transferred through the penstock of a hydropower plant it leaves a residue on the pipe surface. Accumulated residue over time causes a change in the roughness of the pipe surface thus leads to friction losses in the system.The effect is a change in head and discharge relation for the turbines. A multimethodology is proposed for determining the apparent surface roughness value (ε) by means of friction factor f and measuring arithmetic mean deviation of the roughness profile (Ra), root mean square roughness (Rq) and peak and valley roughness (Rz).It is found that a surface roughness value (ε) of 0.3mm can be used for calcinated surfaces which is much higher than steel surfaces but smaller than a concrete surface.
AU  - Celebioglu, Kutay
DO  - 10.18400/tekderg.447265
PY  - 2019
JO  - Teknik Dergi
VL  - 30
IS  - 4
SN  - 1300-3453
SP  - 9309
EP  - 9325
DB  - TRDizin
UR  - http://search/yayin/detay/403572
ER  -