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research-article

A new concept of needle-free jet injector by the impact driven method

[+] Author and Article Information
Prachya Mukda

Department of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University 85 Sathonlamark Road, Warinchamrap, Ubon Ratchathani, 34190, Thailand
mukdaen@hotmail.com

Kulachate Pianthong

Department of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University 85 Sathonlamark Road, Warinchamrap, Ubon Ratchathani, 34190, Thailand
Kulachate.p@ubu.ac.th

Wirapan Seehanam

Department of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University 85 Sathonlamark Road, Warinchamrap, Ubon Ratchathani, 34190, Thailand
wirapan_seehanam@yahoo.com

1Corresponding author.

ASME doi:10.1115/1.4035563 History: Received January 30, 2016; Revised December 19, 2016

Abstract

Currently, most of commercial needle-free jet injectors generate the liquid jet by a method called “driving object method” (DOM); however, the reliability and efficiency are still questioned. This paper proposes a new concept of jet generation method, known as “impact driven method” or IDM. A prototype of an IDM jet injector is designed, built, tested, and compared to a commercial device (Cool.click). Fundamental characteristics, i.e., the exit jet velocity and impact pressure, are measured. Jet injection processes are visualized both in air and in 20% polyacrylamide by high speed photography. In this study, from the prototype of the IDM jet injector, a maximum jet velocity of 400 m/s and impact peak pressure of 68 MPa can be obtained. It is clear that the IDM jet injector provides a double pulsed liquid jet, which is a major advantage over the commercial jet injector. Shorter erosion stage, better penetration, wider lateral dispersion, and considerably less splash back are also found; hence, lower pain level and higher delivery efficiency should be achieved. It can be concluded that the IDM concept is highly feasible for implementation in real applications, either for human or animal injection. However, the control and accuracy of IDM still needs to be carefully investigated. Keyword: needle free jet injection, jet injector, impact driven method, high speed liquid jets.

Copyright (c) 2016 by ASME
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