I would never recommend to do it as burndown are meant for teams, and the focus of team members have to be to make the team burn down reach it's targets.
At the same time if you want to see the individual burn down, create a board with your own filter (assignee == rahul and all other conditions that you need) and it will show your burndown chart.
Render the burn-down-chart PDF template with the PDF View Plugin, by passing the set of issues returned by the sprint's filter, further filtered by the assignee field.
See: sample report
It may not be easiest way to accomplish this, but this is probably the most flexible, due to the template customization possibilities.
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