Abstract: The property of materials and hydrodynamics under high energy density (HED) conditions are crucial for investigations in high energy density science and inertial confinement fusion (ICF). Given the significant challenges posed by experimental methods, including high costs and limited diagnostic capabilities, radiation hydrodynamics simulation has become an essential tool to support and guide experimental design and implementation. In recent years, there has been an urgent need for an open-source, multipurpose radiation hydrodynamics numerical simulation program for integrated HED experiments. To address this demand, we have developed a modular and multipurpose one-dimensional highly compressible radiation hydrodynamics simulation program Aardvark, written in C/C++. It can be used for multi-physics predictions of fluid or plasma targets under various drives, such as intense heavy ion beams, high-current Z-pinches, and laser or hohlraum radiation. As an illustration of its application, we have used the Aardvark program to conduct numerical studies of typical HED scenarios under various drives.