Regression Rate Study of Cylindrical Stepped Fuel Grain of Hybrid Rocket

Kumar, Manish; Joshi, Puran Chandra

doi:10.1016/j.matpr.2017.07.163

Cited by 5 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the pressure oscillation was measured to be only about 4% of the chamber mean pressure [120]. Kumar and Joshi [124]-instead of using only two different cylindrical fuel grains-utilized five fuel grain cylinders with two different inner diameters (25 mm and 35 mm). The grain parts were glued together (with alternating inner diameters) to create a stepped grain.…”

Section: Turbulence and Heat Transfer Enhancing Devicesmentioning

confidence: 99%

Evaluation of Regression Rate Enhancing Concepts and Techniques for Hybrid Rocket Engines

Glaser

Hijlkema

Anthoine

2022

Aerotec. Missili Spaz.

View full text Add to dashboard Cite

The low regression rate of Hybrid Rocket Engines (HREs) is one prominent characteristic that is addressed in most abstracts concerning hybrid propulsion. Over the years, researchers developed and investigated numerous ways to tackle the low regression rate problem of HREs. This article is a collection and assessment of these diverse methods and designs. It allows for a quick overview of the different mechanisms that are being employed and can serve both as information and inspiration. The enhancement ideas are grouped together as (a) adjustments to the solid fuel chemical properties, (b) advanced injection methods and concepts and (c) improving the combustion chamber design. These different techniques are discussed and their individual impact on the regression rate is assessed both qualitatively and quantitatively. All methods that are presented come with a different set of advantages and disadvantages, making the regression rate enhancement a trade-off problem. In our view, the most promising designs and methods are those that only call for minor adjustments to the HRE design, as they can be also added to already existing engines. Above all, it is to be said that regression rate enhancing techniques that change the unique features of HREs (namely safety, simplicity and low cost) are to be employed with caution. Only if the achievable regression rate increase is justifying the implications for the HRE in the envisioned use-case, these concepts represent promising alternatives to the status quo.

show abstract

Section: Turbulence and Heat Transfer Enhancing Devicesmentioning

confidence: 99%

Evaluation of Regression Rate Enhancing Concepts and Techniques for Hybrid Rocket Engines

Glaser

Hijlkema

Anthoine

2022

Aerotec. Missili Spaz.

View full text Add to dashboard Cite

show abstract

“…In order to achieve a higher regression rate with common fuel block manufacturing, multiple grains with different geometries or geometrical orientations can be stacked. Examples are stepped fuel blocks [2] or multiport geometries, which are rotated against each other [3][4][5]. The disadvantage of such methods is the inconsistent regression rate over the fuel block length due to higher regression rates only occurring in vortex areas [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Examples are stepped fuel blocks [2] or multiport geometries, which are rotated against each other [3][4][5]. The disadvantage of such methods is the inconsistent regression rate over the fuel block length due to higher regression rates only occurring in vortex areas [2,4,5]. Common ways to create a geometry of the fuel grain are limited to a constant shape over the fuel block length due to manufacturing effort.…”

Section: Introductionmentioning

confidence: 99%

Design, Production and Evaluation of 3D-Printed Mold Geometries for a Hybrid Rocket Engine

et al. 2021

View full text Add to dashboard Cite

The feasibility of 3D-printed molds for complex solid fuel block geometries of hybrid rocket engines is investigated. Additively produced molds offer more degrees of freedom in designing an optimized but easy to manufacture mold. The solid fuel used for this demonstration was hydroxyl-terminated polybutadiene (HTPB). Polyvinyl alcohol (PVA) was chosen as the mold material due to its good dissolving characteristics. It is shown that conventional and complex geometries can be produced reliably with the presented methods. In addition to the manufacturing process, this article presents several engine tests with different fuel grain geometries, including a short overview of the test bed, the engine and first tests.

show abstract

“…Taken from [5] with permission. References (from top to bottom): AIEB [119], Bi-vortex [120], AP + Ferric oxide [121], Helical grain [122], Bluff body [123], Paraffin [124], DTI [125], GAP [126], Multi section swirl [127], Expandable graphite [128], Aluminium hydride [129], Head-end swirl [130], CAMUI fuel port [131], Double tube [132], Two section swirl [133], Concave-convex [134], Armoured grain [58], Diaphragm (4 hole) [135], Amorphous aluminium [136], 5-stepped fuel [137], Vortex injection [138], Single step [139], Single diaphragm [140], Carbon nano tubes [141], Carbon black [142], Transition metal [143], Multi segmented grain [144], Hollow cone injector [145], Nested helix [59].…”

mentioning

confidence: 99%

Bridging the Technology Gap: Strategies for Hybrid Rocket Engines

Glaser,

Hijlkema,

Anthoine

2023

Aerospace

View full text Add to dashboard Cite

Hybrid rocket propulsion, first demonstrated by the Russian GIRD-09 rocket in 1933, combines liquid oxidizer and solid fuel for thrust generation. Despite numerous advantages, such as enhanced safety, controllability, and potential environmental benefits, hybrid propulsion has yet to achieve its full potential in space applications. In recent years, the research on hybrid propulsion has gained enormous momentum in both academia and industry. Recent accomplishments such as the altitude record for student rockets (64 km), the launch of the first electric pump-fed hybrid rocket, and a successful 25 s hovering test highlight the potential of hybrid rockets. However, although the hybrid community is growing constantly, industrial utilizations and in-space validations do not yet exist. In this work, we reassess the possibilities of hybrid rocket engines by presenting potential fields of applications from the literature. Most importantly, we identify the technical challenges that hinder the breakthrough of hybrid propulsion in the space sector and evaluate the technologies and approaches necessary to bridge the gaps in hybrid rocket development.

show abstract

Regression Rate Study of Cylindrical Stepped Fuel Grain of Hybrid Rocket

Cited by 5 publications

References 5 publications

Evaluation of Regression Rate Enhancing Concepts and Techniques for Hybrid Rocket Engines

Evaluation of Regression Rate Enhancing Concepts and Techniques for Hybrid Rocket Engines

Design, Production and Evaluation of 3D-Printed Mold Geometries for a Hybrid Rocket Engine

Bridging the Technology Gap: Strategies for Hybrid Rocket Engines

Contact Info

Product

Resources

About