TY - JOUR UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-79955555489&doi=10.3923%2fjas.2011.1624.1629&partnerID=40&md5=15e45bec48f7d48347e38f2ac32c4307 JF - Journal of Applied Sciences A1 - Mohammed, S.E. A1 - Iffa, E.D. A1 - Baharom, M.B. A1 - Aziz, A.R.A. VL - 11 EP - 1629 Y1 - 2011/// SN - 18125654 N2 - This study tries to characterize the spray of compressed natural gas (CNG) and hydrogen under ambient conditions using Schlieren imaging technique and image processing. A comparative analysis of the tests is presented. Both wide and narrow cone angle injectors had been used to investigate the spray development and their behaviors at different injection pressure (1.2 to 1.8 MPa). It was found that the intensity of the injected gas for narrow angle injector was higher than wide angle injector before the time reached 5.0 m sec-1. Generally, both the penetration and cone angle show an increase with the increase of injection pressure. As for the spray of pure H2, the images showed that the spray spreads faster than pure CNG and the spray has also exhibited a larger cone angle due to the lower density of hydrogen relative to CNG. © 2011 Asian Network for Scientific Information. IS - 9 N1 - cited By 3 ID - scholars2145 TI - Spray characteristic comparisons of compressed natural gas and hydrogen fuel using digital imaging SP - 1624 AV - none ER -