Steady-Flow Test for Tumble in an Engine Cylinder

Yoshisuke Hamamoto, Eiji Tomita, Guobang Liu, Seiichi Tanabe, Zhong Zhang

Research output: Contribution to journalArticlepeer-review


In this study, the validity of the steady-flow test for tumble in the cylinder of a pent-roof-type S. I. engine with 4 valves was examined. The tumbling flow velocity in the cylinder at TDC of a compression stroke was measured with a LDV, and the angular velocity was determined. The measurement results were compared with the results of steady-flow tests. Two types of steady-flow tests were examined. In the first method the characteristic value of tumble speed was determined from the data of flow velocity distribution measured with a hot-wire anemometer, and in the second one a paddle wheel was used. As a result, it was recognized that the steady-flow tests were effective in evaluating the tumbling flow performance of an intake system.

Original languageEnglish
Pages (from-to)3577-3582
Number of pages6
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Issue number578
Publication statusPublished - 1994


  • Flow Measurements
  • Gasoline Engine
  • Internal Combustion Engine
  • Steady-Flow Test
  • Swirl
  • Tumble

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering


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