148
S. N. Mahottamananda et al.
the pressure variation between the atmospheric and injection pressure, also increases
higher flow rate. It is also observed that for varying injection pressures SW3 injector
configuration delivered 1–6% higher volume flow rate compared to SW1 injector
configuration. The effect of tangential inlet port angle on volume flow rate is shown
in Fig. 9. It is observed that SW2 injector delivered 3–6% higher volume flow rate
compared to SW1 swirl injector configuration.
4 Conclusion
The spray characteristics of plug type swirl injectors configuration are experimentally
analyzed and the effect of number of inlet tangential ports and tangential port angles
on spray characteristics are studied. The summary of the findings is given below.
• It is observed that for all injection pressures, SW1 injector configuration produced
43–49% lesser breakup length compared to SW3 injector configuration.
• It is observed that for all injection pressures, SW1 injector configurations,
produced 7–11% lesser breakup length compared to SW2 injector configuration.
• It is also observed that at all injection pressures, SW1 injector configuration
formed 39–51% higher spray cone angle compared to SW3 injector configuration.
• It is observed that at all injection pressures, SW1 injector formed 1–3% higher
spray cone angle compared to SW2 injector configuration.
• It is also observed that for SW1 injector configuration C d varies from 0.1 to 0.6
and for SW3 injector configuration C d varies from 0.11 to 0.13.
• It is observed that SW2 configuration gave 1–2% higher discharge coefficient
compared to SW1 injector configuration.
• It is also observed that at all pressures, SW3 injector delivered 1–6% higher
volume flow rate compared to SW1 injector configuration.
• It is observed that SW2 injector configuration delivered 3–6% higher volume flow
rate compared to SW1 swirl injector configuration.
From the above results, it is concluded that SWI injector configuration gives lesser
breakup length and spray cone angle compared to other configurations. These spray
characteristics of SW1 injector configuration feature aids in a shorter combustor.
References
1. Mahottamananda SN, Rafnaz M, Kadiresh PN (2018) Spray characteristics of plug type swirl
injector. In: Advances in science and engineering technology international conference. IEEE
Conference Publication, pp 1–6. https://doi.org/10.1109/ICASET.2018.8376804
2. Yule AJ, Widger IR (1996) Swirl atomizers operating at high water pressure. Int J Mech Sci
38:981–999. https://doi.org/10.1016/0020-7403(95)00095-X
3. Hamid AHA (2011) Spray cone angle and air core diameter of hollow cone swirl rocket injector.
IIUM Eng J 12. https://doi.org/10.31436/iiumej.v12i3.66
S. N. Mahottamananda et al.
the pressure variation between the atmospheric and injection pressure, also increases
higher flow rate. It is also observed that for varying injection pressures SW3 injector
configuration delivered 1–6% higher volume flow rate compared to SW1 injector
configuration. The effect of tangential inlet port angle on volume flow rate is shown
in Fig. 9. It is observed that SW2 injector delivered 3–6% higher volume flow rate
compared to SW1 swirl injector configuration.
4 Conclusion
The spray characteristics of plug type swirl injectors configuration are experimentally
analyzed and the effect of number of inlet tangential ports and tangential port angles
on spray characteristics are studied. The summary of the findings is given below.
• It is observed that for all injection pressures, SW1 injector configuration produced
43–49% lesser breakup length compared to SW3 injector configuration.
• It is observed that for all injection pressures, SW1 injector configurations,
produced 7–11% lesser breakup length compared to SW2 injector configuration.
• It is also observed that at all injection pressures, SW1 injector configuration
formed 39–51% higher spray cone angle compared to SW3 injector configuration.
• It is observed that at all injection pressures, SW1 injector formed 1–3% higher
spray cone angle compared to SW2 injector configuration.
• It is also observed that for SW1 injector configuration C d varies from 0.1 to 0.6
and for SW3 injector configuration C d varies from 0.11 to 0.13.
• It is observed that SW2 configuration gave 1–2% higher discharge coefficient
compared to SW1 injector configuration.
• It is also observed that at all pressures, SW3 injector delivered 1–6% higher
volume flow rate compared to SW1 injector configuration.
• It is observed that SW2 injector configuration delivered 3–6% higher volume flow
rate compared to SW1 swirl injector configuration.
From the above results, it is concluded that SWI injector configuration gives lesser
breakup length and spray cone angle compared to other configurations. These spray
characteristics of SW1 injector configuration feature aids in a shorter combustor.
References
1. Mahottamananda SN, Rafnaz M, Kadiresh PN (2018) Spray characteristics of plug type swirl
injector. In: Advances in science and engineering technology international conference. IEEE
Conference Publication, pp 1–6. https://doi.org/10.1109/ICASET.2018.8376804
2. Yule AJ, Widger IR (1996) Swirl atomizers operating at high water pressure. Int J Mech Sci
38:981–999. https://doi.org/10.1016/0020-7403(95)00095-X
3. Hamid AHA (2011) Spray cone angle and air core diameter of hollow cone swirl rocket injector.
IIUM Eng J 12. https://doi.org/10.31436/iiumej.v12i3.66