Heat Flux Measurements in a small-scale Oxygen-Hydrogen Rotating Detonation Rocket Combustor

Ditsche, Florian and Petersen, Jannis and Propst, Martin and Armbruster, Wolfgang and Börner, Michael and Hardi, Justin and Tajmar, Martin and Bach, Christian (2025) Heat Flux Measurements in a small-scale Oxygen-Hydrogen Rotating Detonation Rocket Combustor. In: 35th International Symposium on Space Technology and Science. 35th International Symposium on Space Technology and Science ISTS, 2025-07-12 - 2025-07-18, Tokushima, Japan.

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Abstract

This study investigated heat flux measurement in a small-scale capacitively cooled hydrogen-oxygen Rotating Detonation Rocket Combustor (RDRC). For the heat flux measurement, the combustor’s outer body was equipped with clusters of thermocouples, to measure the heat flux via the gradient method. A total number of 25 different test conditions have been investigated. The mass flow rate was varied from 45 to 70 gs-1. Ratios of oxidizer to fuel (ROF) of 5.8 and 7.2 were tested. Test durations reached from 0.7 to 1.5 s. Additionally, several tests were conducted with an Aerospike nozzle with a constriction ratio of 2. In some of the tests, unexpected behavior of the measured temperatures was visible. These tests were excluded from the analysis. From the remaining tests a strong coupling of heat flux with mass flow rate was found. With higher mass flow rates, higher heat fluxes were measured. The highest heat fluxes were measured in the cluster nearest to the injector. The measured values reached up to 7 MW/m2 at 0.7s and up to 8.9 MW/m2 at 1.5s test duration.

Item URL in elib:

https://elib.dlr.de/215125/

Document Type:

Conference or Workshop Item (Speech)

Title:

Heat Flux Measurements in a small-scale Oxygen-Hydrogen Rotating Detonation Rocket Combustor

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Ditsche, Florian	UNSPECIFIED	https://orcid.org/0000-0002-5050-2506	187575077
Petersen, Jannis	TUD Dresden University of Technology, Institute of Aerospace Engineering, Chair of Space Systems, Dresden, Germany	https://orcid.org/0000-0002-4456-8082	187575079
Propst, Martin	TUD Dresden University of Technology, Institute of Aerospace Engineering, Dresden, Germany	UNSPECIFIED	UNSPECIFIED
Armbruster, Wolfgang	UNSPECIFIED	https://orcid.org/0000-0002-4859-4173	187575080
Börner, Michael	UNSPECIFIED	https://orcid.org/0000-0002-3441-2869	187575081
Hardi, Justin	UNSPECIFIED	https://orcid.org/0000-0003-3258-5261	UNSPECIFIED
Tajmar, Martin	TUD Dresden University of Technology, Institute of Aerospace Engineering, Chair of Space Systems, Dresden, Germany	https://orcid.org/0000-0002-4859-4173	187575080
Bach, Christian	TUD Dresden University of Technology, Institute of Aerospace Engineering, Chair of Space Systems, Dresden, Germany	https://orcid.org/0000-0003-4745-6921	UNSPECIFIED

Date:

15 July 2025

Journal or Publication Title:

35th International Symposium on Space Technology and Science

Refereed publication:

Yes

Open Access:

Gold Open Access:

In SCOPUS:

In ISI Web of Science:

Status:

Published

Keywords:

Rotating Detonation Rocket Engine, Heat Flux Measurement, Hydrogen

Event Title:

35th International Symposium on Space Technology and Science ISTS

Event Location:

Tokushima, Japan

Event Type:

international Conference

Event Start Date:

12 July 2025

Event End Date:

18 July 2025

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Space

HGF - Program Themes:

Space Transportation

DLR - Research area:

Raumfahrt

DLR - Program:

R RP - Space Transportation

DLR - Research theme (Project):

R - Reusable Space Systems and Propulsion Technology

Location:

Lampoldshausen

Institutes and Institutions:

Institute of Space Propulsion > Rocket Propulsion Technology

Deposited By:

Armbruster, Wolfgang

Deposited On:

09 Jul 2025 10:13

Last Modified:

09 Jul 2025 10:13

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